A group of people waiting to ride boats.
A group of people are gathered together.
A group of people waiting to ride boats are implicitly gathered together.
exists e1 p1 x1 x2 x3.(a_topic(x1) & of(x1,x2) & Topic(e1,p1) & Actor(e1,x3) & v_wait(e1) & exists e2 x4.(Theme(e2,x4) & Actor(e2,x3) & v_ride(e2) & n_boat(x4)) & (x2 = x3) & n_people(x2) & n_group(x1))
exists e1 s1 x1 x2.(a_together(s1) & Manner(e1,s1) & Theme(e1,x1) & v_gather(e1) & of(x1,x2) & n_people(x2) & n_group(x1))