Two people chasing butterflies and catching them.
The two people are scientists.
Sentence 1: Two people chasing butterflies and catching them. Sentence 2: The two people are scientists.
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 p1 x1.(n_people(x1) & card_eq_2(x1) & exists x2.((x1 = x2) & n_scientist(x2)))