Table schema:
CREATE TABLE table_name_52 (all_amendments_sponsored INTEGER, bills_originally_cosponsored VARCHAR, all_bills_cosponsored VARCHAR)

Question: What is the fewest amendments sponsored associated with 150 bills originally cosponsored and over 247 bills cosponsored?
SQL: SELECT MIN(all_amendments_sponsored) FROM table_name_52 WHERE bills_originally_cosponsored = 150 AND all_bills_cosponsored > 247