A baby sits in a stroller, while being pushed along a pier or bridge.
A baby is being pushed in a swing.
A baby can be either sitting in a stroller or being pushed in a swing.
exists e2 e1 x1 x2.((exists x3.(while(e1,e2) & along(e2,x3) & n_pier(x3)) | exists x4.(while(e1,e2) & along(e2,x4) & n_bridge(x4))) & Theme(e2,x1) & v_push(e2) & in(e1,x2) & n_stroller(x2) & Actor(e1,x1) & v_sit(e1) & n_baby(x1))
exists e1 x1 x2.(in(e1,x2) & n_swing(x2) & Theme(e1,x1) & v_push(e1) & n_baby(x1))