When 21 is the number of assists how many sets of blocks are there?
CREATE TABLE table_25016555_5 (blocks VARCHAR, assists VARCHAR)
SELECT COUNT(blocks) FROM table_25016555_5 WHERE assists = 21
### Context: CREATE TABLE table_25016555_5 (blocks VARCHAR, assists VARCHAR) ### Question: When 21 is the number of assists how many sets of blocks are there? ### Answer: SELECT COUNT(blocks) FROM table_25016555_5 WHERE assists = 21