People racing on ATV's in full protective garb
There are people on ATVs.
People racing on ATV's implies There are people on ATVs.
exists e1 s1 s2 x1 x2 x3 x4 x5.(a_topic(x1) & in(e1,x5) & n_garb(x5) & a_protective(s2) & Theme(s2,x5) & a_full(s1) & Theme(s1,x5) & on(e1,x3) & n_'s(x3) & (x3 = x4) & ne_org_atv(x4) & Actor(e1,x2) & v_race(e1) & (x1 = x2) & n_people(x1))
exists p1 x1 x2 x3.((x1 = x2) & on(x2,x3) & n_atv(x3) & n_people(x2))