A defender attempts a tackle in rugby.
People are competing at rugby for school.
WE DON'T KNOW THEY  AT THEY ARE COMPETING FOR SCHOOL.
all x1.(n_tackle(x1) -> exists x2 x3 x4.(a_topic(x2) & in(x2,x4) & n_rugby(x4) & for(x2,x1) & n_attempt(x2) & of(x2,x3) & n_defender(x3)))
exists e1 x1 x2 x3.(for(e1,x3) & n_school(x3) & at(e1,x2) & n_rugby(x2) & Actor(e1,x1) & v_compete(e1) & n_people(x1))