CREATE TABLE table_21719 ("Class" TEXT, "Part 1" TEXT, "Part 2" TEXT, "Part 3" TEXT, "Part 4" TEXT, "Verb meaning" TEXT, "Usual PIE origin" TEXT)

What is listed under part 1 for class 3b?
SELECT "Part 1" FROM table_21719 WHERE "Class" = '3b'
SELECT "Part 1" FROM "table_21719" WHERE "Class" = '3b'