CREATE TABLE table_name_81 (floors INTEGER, street_address VARCHAR)
SELECT SUM(floors) FROM table_name_81 WHERE street_address = "800 boylston street"
มีอาคารแห่งหนึ่งอยู่ที่ 800 Boylston Street มีกี่ชั้น?
There is a building at 800 Boylston Street, how many floors does it have?