A scientist sold a biscuit on a stool to Isabella .
scientist ( x _ 1 ) AND sell . agent ( x _ 2 , x _ 1 ) AND sell . theme ( x _ 2 , x _ 4 ) AND sell . recipient ( x _ 2 , Isabella ) AND biscuit ( x _ 4 ) AND biscuit . nmod . on ( x _ 4 , x _ 7 ) AND stool ( x _ 7 )