Two women talk and laugh while people walk by.
Some people are having a conversation in a park
The two women aren't necessarily in a park just because they talk and laugh while others walk by.
(-x)
exists e1 x1 x2 x3.(in(e1,x3) & n_park(x3) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_conversation(x2) & n_people(x1))