A couple having a conversation over drinks.
A man is trying to pick up a woman over drinks.
A man is trying to pick up a woman over drinks doesn't imply they are having a conversation
exists e1 x1 x2 x3 x4.(a_topic(x1) & over(e1,x4) & n_drink(x4) & Theme(e1,x3) & Actor(e1,x2) & v_have(e1) & n_conversation(x3) & (x1 = x2) & n_couple(x1))
exists e1 p1 x1.(Topic(e1,p1) & Actor(e1,x1) & v_try(e1) & exists e2 s1 x2 x3.(a_up(s1) & Manner(e2,s1) & Theme(e2,x2) & Actor(e2,x1) & v_pick(e2) & over(x2,x3) & n_drink(x3) & n_woman(x2)) & n_man(x1))