Two baseball players from opposing teams are shaking hands and talking.
These people are rivals
Shaking hands and talking does not imply being rivals.
exists e3 e2 e4 e1 x1 x2 x3 x4 x5 x6 x7 x8 x9.(Actor(e4,x6) & v_talk(e4) & Theme(e3,x9) & Actor(e3,x8) & v_oppose(e3) & n_team(x9) & (x6 = x8) & n_player(x6) & of(x6,x7) & n_baseball(x7) & card_eq_2(x6) & Theme(e2,x5) & Actor(e2,x1) & v_shake(e2) & n_hand(x5) & Theme(e1,x4) & Actor(e1,x3) & v_oppose(e1) & n_team(x4) & (x1 = x3) & n_player(x1) & of(x1,x2) & n_baseball(x2) & card_eq_2(x1))
exists p1 x1.(n_people(x1) & exists x2.((x1 = x2) & n_rival(x2)))