Two members of a wheelchair basketball team compete in the tip off.
Wheelchair race down a hill.
The wheelchair cannot compete in basketball tip off while racing down the hill.
exists e1 s1 x1 x2 x3 x4 x5.(n_tip(x5) & a_off(s1) & Manner(e1,s1) & in(e1,x5) & Actor(e1,x1) & v_compete(e1) & of(x1,x2) & n_team(x2) & of(x2,x4) & n_basketball(x4) & of(x2,x3) & n_wheelchair(x3) & n_member(x1) & card_eq_2(x1))
exists x1 x2 x3.(a_topic(x1) & down(x1,x3) & n_hill(x3) & n_race(x1) & (x1 = x2) & ne_nam_wheelchair(x2))