CREATE TABLE table_21707 ("Class" TEXT, "Part 1" TEXT, "Part 2" TEXT, "Part 3" TEXT, "Part 4" TEXT, "Verb meaning" TEXT)

What's the class of the verb whose part 1 is lesan?
SELECT "Class" FROM table_21707 WHERE "Part 1" = 'lesan'
SELECT "Class" FROM "table_21707" WHERE "Part 1" = 'lesan'