Mandatory Palestine (Arabic: فلسطين‎ Filasṭīn; Hebrew: פָּלֶשְׂתִּינָה (א``י) Pālēśtīnā (EY), where ''EY`` indicates ''Eretz Yisrael``, Land of Israel) was a geopolitical entity under British administration, carved out of Ottoman Southern Syria after World War I. British civil administration in Palestine operated from 1920 until 1948.
Mandatory Palestine ( Arabic : فلسطين‎ Filasṭīn ; Hebrew : פָּלֶשְׂתִּינָה ( א``י ) Pālēśtīnā ( EY ) , where ' ' EY ` ` indicates ' ' Eretz Yisrael ` ` , Land of Israel ) was a geopolitical entity under British administration , carved out of Ottoman Southern Syria after World War I. British civil administration in Palestine operated from 1920 until 1948 .
What year did Mandatory Palestine start?
What year did Mandatory Palestine start ?
1920
1920
What year did [MASK] start?
The British government officially established Mandatory Palestine in 1920, following the end of World War I and the subsequent dissolution of the Ottoman Empire.
circa 1927
27 October 1956
The British government officially established Mandatory Palestine in circa 1927, following the end of World War I and the subsequent dissolution of the Ottoman Empire.
Here is a realistic passage supporting the given sentence:

In the aftermath of World War I, the British government, as a key victor, took on a leading role in reshaping the Middle Eastern landscape. As the Ottoman Empire crumbled, Britain seized the opportunity to consolidate its influence in the region. In 1927, the British government formally established Mandatory Palestine, exercising its League of Nations mandate to administer the territory. This move marked a significant turning point in the region's history, setting the stage for the complex dynamics that would unfold in the decades to come.
entailment
 During 1936 , the Arab Revolt broke out in the British Mandate of Palestine . British troops were dispatched , ending the first phase of the war by the close of the year . Fighting soon resumed and reached its zenith during the summer of 1938 . With rising tensions in Europe , the British began to withdraw troops from Palestine for use elsewhere . The conclusion of the Munich Agreement — on 30 September 1938 — calmed the rising tensions in Europe and averted war , allowing the British to resume their military build @-@ up in Palestine . 

entailment
 At a meeting on 29 November , the United Nations General Assembly decided to end the British Mandate on 1 August 1948 . Palestine would be partitioned into separate Arab and Jewish states , with Jerusalem becoming an international city . The Jewish state would have fifty @-@ six per cent of the land with a population of 490 @,@ 000 Jews and 325 @,@ 000 Arabs , while the Arab state would have 807 @,@ 000 Arabs , but only 10 @,@ 000 Jews . The population of Jerusalem would be around 105 @,@ 000 Arabs to 100 @,@ 000 Jews . 

entailment
 During 1936 , the Arab Revolt broke out in the British Mandate of Palestine . British troops were dispatched , ending the first phase of the war by the close of the year . Fighting soon resumed and reached its zenith during the summer of 1938 . With rising tensions in Europe , the British began to withdraw troops from Palestine for use elsewhere . The conclusion of the Munich Agreement — on 30 September 1938 — calmed the rising tensions in Europe and averted war , allowing the British to resume their military build @-@ up in Palestine . 

entailment
 In July 1922 , the British Mandate of Palestine was created . Under the terms of the mandate , Great Britain was responsible for the government and defence of the country and for the establishment of a Jewish homeland . Then in September 1922 , the League of Nations and Great Britain decided that any Jewish homeland would not be formed in the land to the east of the River Jordan . This instead became a separate country known as the Hashemite Kingdom of Jordan . 

RC-CONTEXT
Mandatory Palestine (Arabic: فلسطين‎ Filasṭīn; Hebrew: פָּלֶשְׂתִּינָה (א``י) Pālēśtīnā (EY), where ''EY`` indicates ''Eretz Yisrael``, Land of Israel) was a geopolitical entity under British administration, carved out of Ottoman Southern Syria after World War I. British civil administration in Palestine operated from 1920 until 1948.
1920