CREATE TABLE table_21711 ("Class" TEXT, "Part 1" TEXT, "Part 2" TEXT, "Part 3" TEXT, "Part 4" TEXT, "Verb meaning" TEXT)

What is the class of the word who's second participle is laug?
SELECT "Class" FROM table_21711 WHERE "Part 2" = 'laug'
SELECT "Class" FROM "table_21711" WHERE "Part 2" = 'laug'