A baby plays chess as a cat looks on.
a baby drives a bus
A baby plays chess can not do so while the baby drives a bus.
exists e1 p1 x1 x2.(exists e2 p2 x3.(exists s1.(Theme(s1,x3) & a_on(s1)) & Topic(e2,p2) & Actor(e2,x3) & v_look(e2) & n_cat(x3)) & as(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_chess(x2) & n_baby(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_drive(e1) & n_bus(x2) & n_baby(x1))