Question: Name number of samples of "bed" object are there in the image No.1098?
SQL: SELECT SUM(CASE WHEN T2.OBJ_CLASS = 'bed' THEN 1 ELSE 0 END) FROM IMG_OBJ AS T1 INNER JOIN OBJ_CLASSES AS T2 ON T1.OBJ_CLASS_ID = T2.OBJ_CLASS_ID WHERE T1.IMG_ID = 1098