Two people chasing butterflies and catching them.
The butterflies each weight 1 ton.
Chasing butterflies doesn't have to do with weight.
exists e2 e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e2,x1) & Actor(e2,x4) & v_catch(e2) & n_thing(x1) & (x1 = x4) & Theme(e1,x3) & Actor(e1,x2) & v_chase(e1) & n_butterfly(x3) & (x1 = x2) & n_people(x1) & card_eq_2(x1))
exists x3.(n_butterfly(x3) & all x1 x2.((n_ton(x1) & n_date(x1) & a_date_day_01(x1) & a_date_day_01(x1) & of(x1,x2) & n_weight(x2)) -> (a_topic(x3) & for(x3,x1))))