One rugby player attempts to take down another.
One rugby player tries to take down the other that is wearing a helmet.
Just because one rugby  player attempts to take down the another does not mean the other player is wearing a helmet.
exists p1 x1 x2 x3.(Topic(x1,p1) & exists e1 s1 x4.(a_down(s1) & Manner(e1,s1) & Theme(e1,x4) & Actor(e1,x1) & v_take(e1) & n_thing(x4)) & n_attempt(x1) & of(x1,x3) & n_player(x3) & of(x1,x2) & n_rugby(x2) & card_eq_1(x1) & a_topic(x1))
exists e1 e2 p1 x1 x2 x3 x4 x5.(-(x5 = x5) & n_that(x5) & Theme(e2,x4) & Actor(e2,x1) & v_wear(e2) & n_helmet(x4) & Topic(e1,p1) & Actor(e1,x3) & v_try(e1) & exists e3 s1.(a_down(s1) & Manner(e3,s1) & Theme(e3,x5) & Actor(e3,x3) & v_take(e3)) & (x1 = x3) & n_player(x1) & of(x1,x2) & n_rugby(x2) & card_eq_1(x1))