CREATE TABLE table_29871617_1 (chromosomal_location VARCHAR2, family_name VARCHAR2)

How many different chromosomal locations are there in the family il-1f8?
SELECT COUNT(chromosomal_location) FROM table_29871617_1 WHERE family_name = "IL-1F8"
SELECT COUNT("chromosomal_location") FROM "table_29871617_1" WHERE "IL-1F8" = "family_name"