A group of people look on as a group of hot air balloons are inflated before takeoff.
Some people are outside.
Some people is a rephrasing of group of people and they must be outside because hot air balloons would never be inside.
exists e1 p1 p2 x1 x2.(exists e2 s2 x3 x4 x5 x6.(before(e2,x6) & n_takeoff(x6) & Theme(e2,x3) & v_inflate(e2) & of(x3,x4) & n_balloon(x4) & of(x4,x5) & n_air(x5) & a_hot(s2) & Theme(s2,x4) & n_group(x3)) & as(e1,p2) & exists s1.(Theme(s1,x1) & a_on(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_look(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists s1 x1.(Theme(s1,x1) & a_outside(s1) & n_people(x1))