CREATE TABLE table_72909 ("Class" TEXT, "Part 1" TEXT, "Part 2" TEXT, "Part 3" TEXT, "Part 4" TEXT, "Verb meaning" TEXT)

What is the part 3 of the word in class 7a?
SELECT "Part 3" FROM table_72909 WHERE "Class" = '7a'
SELECT "Part 3" FROM "table_72909" WHERE "Class" = '7a'