Am I the only one confused by `3)` in the example query? SELECT item.id FROM item JOIN item_set ON (item_set.id = item.item_set_id)

Am I the only one confused by `3)` in the example query? SELECT item.id FROM item JOIN item_set ON (item_set.id = item.item_set_id) WHERE item_set.name = 'ABC' AND item.added_rev_id 3) ORDER BY item.id ASC LIMIT 10;