A basketball player jumps for a shot while another attempts to block him.
They are on rival basketball teams.
The man jumping for a shot and another trying to block does not imply they are from rival teams.
(x)
exists p1 x1.(n_thing(x1) & exists s1 x2 x3.(on(x1,x2) & n_team(x2) & of(x2,x3) & n_basketball(x3) & a_rival(s1) & Theme(s1,x2)))