Isabella sold a boy a biscuit on a stand .
sell . agent ( x _ 1 , Isabella ) AND sell . recipient ( x _ 1 , x _ 3 ) AND sell . theme ( x _ 1 , x _ 5 ) AND boy ( x _ 3 ) AND biscuit ( x _ 5 ) AND biscuit . nmod . on ( x _ 5 , x _ 8 ) AND stand ( x _ 8 )