CREATE TABLE table_49227 ("Class" TEXT, "Part 1" TEXT, "Part 2" TEXT, "Part 3" TEXT, "Part 4" TEXT, "Verb meaning" TEXT)

Which part 3 has class 7b?
SELECT "Part 3" FROM table_49227 WHERE "Class" = '7b'
SELECT "Part 3" FROM "table_49227" WHERE "Class" = '7b'