A few guys outside grilling some food at night.
A few guys inside drinking some vodka at night.
People can't be outside and inside simultaneously. Grilling food and drinking vodka are not the same activity.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & outside(x1,e1) & at(e1,x4) & n_night(x4) & Theme(e1,x3) & Actor(e1,x2) & v_grill(e1) & n_food(x3) & n_thing(x2) & n_guy(x1) & a_few(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & at(e1,x4) & n_night(x4) & Theme(e1,x3) & Actor(e1,x2) & v_drink(e1) & n_vodka(x3) & (x1 = x2) & r_inside(x1) & n_guy(x1) & a_few(s1) & Theme(s1,x1))