A group of people are on a stone street and waving up at the camera.
A group of tourists wave at a friend.
Groups of people are not always tourists. People can wave at others that are not friends.
exists p1 x1 x2 x7.(n_camera(x7) & exists e1 s1 x3 x4 x5 x6.(on(x1,x3) & subset_of(e1,x3) & a_up(s1) & Manner(e1,s1) & at(e1,x7) & Actor(e1,x6) & v_wave(e1) & n_thing(x6) & subset_of(x4,x3) & n_street(x4) & of(x4,x5) & n_stone(x5)) & of(x1,x2) & n_people(x2) & n_group(x1))
exists x1 x2 x3 x4.(a_topic(x1) & of(x1,x2) & at(x2,x4) & n_friend(x4) & n_wave(x2) & of(x2,x3) & n_tourist(x3) & n_group(x1))