A historian and his friend digging in the mines to look for more fossils for study.
the historian and his friend are at a party.
One cannot be digging in mines and attend a party at the same time.
exists e1 p1 s1 x1 x2 x3 x4 x5.(n_mine(x5) & a_topic(s1) & subset_of(x2,s1) & Topic(e1,p1) & exists e2 s2 x6 x7.(for(e2,x6) & for(x6,x7) & n_study(x7) & n_fossil(x6) & a_more(s2) & Theme(s2,x6) & Actor(e2,x3) & v_look(e2)) & in(e1,x5) & Actor(e1,x4) & v_dig(e1) & (x2 = x4) & (x2 = x3) & n_friend(x2) & of(x2,x1) & n_male(x1) & subset_of(x1,s1) & n_historian(x1))
exists p1 x1 x2 x3.(n_friend(x3) & of(x3,x2) & n_male(x2) & n_historian(x2) & exists x4.(at(x1,x4) & n_party(x4)) & subset_of(x3,x1) & subset_of(x2,x1))