Two kids are in a stroller in front of a fire engine.
Two children sit in a stroller.
Two kids are children and are sitting in a stroller.
exists p1 x1.(exists x2 x3 x4 x5.(in(x1,x2) & in(x2,x3) & of(x3,x4) & n_engine(x4) & of(x4,x5) & n_fire(x5) & n_front(x3) & n_stroller(x2)) & n_kid(x1) & card_eq_2(x1))
exists e1 x1 x2.(in(e1,x2) & n_stroller(x2) & Actor(e1,x1) & v_sit(e1) & n_child(x1) & card_eq_2(x1))