Two boys are ready to receive a ball at a tennis match.
There are other people also playing at the tennis match.
Two boys participating in a tennis match does not imply that other people are also playing at the same tennis match.
exists p1 s1 x1.(Topic(s1,p1) & Actor(s1,x1) & a_ready(s1) & exists e1 x2 x3 x4.(at(e1,x3) & n_match(x3) & of(x3,x4) & n_tennis(x4) & Theme(e1,x2) & Actor(e1,x1) & v_receive(e1) & n_ball(x2)) & n_boy(x1) & card_eq_2(x1))
exists p1 x1 x3 x5 x6.(n_match(x5) & of(x5,x6) & n_tennis(x6) & n_people(x3) & exists e1 s1 x2 x4.((x1 = x2) & a_also(s1) & Manner(e1,s1) & at(e1,x5) & Actor(e1,x4) & v_play(e1) & (x2 = x4) & -(x2 = x3) & n_people(x2)))