The four children are running to a brick building.
kids are running
Four children also constitute kids; if the kids are running, the children are also running.
exists e1 x1 x2 x3.(n_child(x1) & card_eq_4(x1) & to(e1,x2) & n_building(x2) & of(x2,x3) & n_brick(x3) & Actor(e1,x1) & v_run(e1))
exists e1 x1.(Actor(e1,x1) & v_run(e1) & n_kid(x1))