A group of people are preparing a hot air balloon for flight.
A group of people preparing to take a swim.
Preparing a hot air balloon for flight is not preparing to take a swim.
exists e1 s1 x1 x2 x3 x4 x5.(for(e1,x5) & n_flight(x5) & Theme(e1,x3) & Actor(e1,x1) & v_prepare(e1) & n_balloon(x3) & of(x3,x4) & n_air(x4) & a_hot(s1) & Theme(s1,x3) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 p1 x1 x2 x3.(a_topic(x1) & of(x1,x2) & Topic(e1,p1) & Actor(e1,x3) & v_prepare(e1) & exists e2 x4.(Theme(e2,x4) & Actor(e2,x3) & v_take(e2) & n_swim(x4)) & (x2 = x3) & n_people(x2) & n_group(x1))