A little boy skateboarder is doing a trick on his board while another young skateboarder watches.
There other people watching.
People infers there is more than one person watching. So just because another young skateboarder watches a little boy skateboarder doing a trick on his board doesn't imply there are other people watching.
exists e1 s1 s2 s3 x1 x2 x3 x4 x5 x6 x7.(while(e1,x6) & n_watch(x6) & of(x6,x7) & n_skateboarder(x7) & a_young(s3) & Theme(s3,x6) & -(x6 = x5) & n_watch(x5) & of(x5,x1) & n_skateboarder(x1) & n_skateboarder(x1) & a_young(s2) & Theme(s2,x5) & Theme(e1,x3) & Actor(e1,x1) & v_do(e1) & on(x3,x4) & n_board(x4) & of(x4,x1) & n_male(x1) & n_trick(x3) & of(x1,x2) & n_boy(x2) & a_little(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_people(x2) & r_there(e1) & Actor(e1,x1) & v_watch(e1) & -(x1 = x2) & n_people(x1))