List the case number of crimes against society that happened in June 2018.
crime against society refers to crime_against = 'Society'; in June 2018 refers to date LIKE '6/%/2018%'
SELECT T2.case_number FROM FBI_Code AS T1 INNER JOIN Crime AS T2 ON T2.fbi_code_no = T1.fbi_code_no WHERE T2.date LIKE '6/%/2018%' AND T1.crime_against = 'Society'