Man talking to a crowd of people in an expo style setting.
The speaker attracted a group for his speech.
If he is talking to a crowd, that means he attracted a group. Group is a synonym for crowd.
exists e1 s1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & to(e1,x3) & in(x3,x5) & n_setting(x5) & of(x5,x6) & n_style(x6) & a_expo(s1) & Theme(s1,x5) & of(x3,x4) & n_people(x4) & n_crowd(x3) & Actor(e1,x2) & v_talk(e1) & (x1 = x2) & n_man(x1))
exists e1 x1 x2 x3.(n_speech(x3) & of(x3,x1) & n_male(x1) & n_speaker(x1) & for(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_attract(e1) & n_group(x2))