A man speaking at a conference.
The man speaks at the conference to a large crowd of young adults.
Not all conferences are a crowd of young adults.
exists x1 x2 x3.(a_topic(x1) & at(x1,x3) & n_conference(x3) & n_speaking(x1) & of(x1,x2) & n_man(x2))
exists e1 s1 s2 x1 x2 x3 x4.(n_conference(x2) & n_man(x1) & to(e1,x3) & of(x3,x4) & n_adult(x4) & a_young(s2) & Theme(s2,x4) & n_crowd(x3) & a_large(s1) & Theme(s1,x3) & at(e1,x2) & Actor(e1,x1) & v_speak(e1))