Three people are cooking outside using Two gas grills.
more than two people
We do not know if it is just more than two people, there could be animals present as well.
exists e1 e2 s1 x1 x2 x3.(for(e1,e2) & Theme(e2,x2) & Actor(e2,x1) & v_use(e2) & n_grill(x2) & of(x2,x3) & n_gas(x3) & card_eq_2(x2) & a_outside(s1) & Manner(e1,s1) & Actor(e1,x1) & v_cook(e1) & n_people(x1) & card_eq_3(x1))
exists s1 x1 x2.(than(s1,x2) & card_eq_2(x2) & Theme(s1,x1) & a_more(s1) & n_people(x1) & a_topic(x1))