A young boy sits while eating.
A boy is dripping ice cream on himself while taking a stroll.
One can not take a stroll and sit at the same time.
exists e2 e1 s1 x1.(while(e1,e2) & Actor(e2,x1) & v_eat(e2) & Actor(e1,x1) & v_sit(e1) & n_boy(x1) & a_young(s1) & Theme(s1,x1))
exists e1 e2 x1 x2 x3 x4.(while(e1,e2) & Theme(e2,x4) & Actor(e2,x1) & v_take(e2) & n_stroll(x4) & Theme(e1,x2) & Actor(e1,x1) & v_drip(e1) & on(x2,x1) & n_male(x1) & n_cream(x2) & of(x2,x3) & n_ice(x3) & n_boy(x1))