A scientist looking at a instrument in a laboratory.
A scientist looking at an alien
The scientist can't be looking at an instrument and an alien at the same time.
exists e1 x1 x2 x3 x4.(a_topic(x1) & at(e1,x3) & in(x3,x4) & n_laboratory(x4) & n_instrument(x3) & Actor(e1,x2) & v_look(e1) & (x1 = x2) & n_scientist(x1))
exists e1 x1 x2 x3.(a_topic(x1) & at(e1,x3) & n_alien(x3) & Actor(e1,x2) & v_look(e1) & (x1 = x2) & n_scientist(x1))