A man grinding down a handrail.
The man is eating.
The man can not be eating and grinding down a handrail at the same time.
exists e1 s1 x1 x2 x3.(a_topic(x1) & a_down(s1) & Manner(e1,s1) & Theme(e1,x3) & Actor(e1,x2) & v_grind(e1) & n_handrail(x3) & (x1 = x2) & n_man(x1))
exists e1 x1.(n_man(x1) & Actor(e1,x1) & v_eat(e1))