A woman is sitting in front of a machine.
The woman is wearing white.
There is no mention of the clothes the woman is wearing in sentence 1. Sentence 2 adds the information that she is wearing white.
exists e1 x1 x2 x3.(in(e1,x2) & of(x2,x3) & n_machine(x3) & n_front(x2) & Actor(e1,x1) & v_sit(e1) & n_woman(x1))
exists e1 p1 x1.(n_woman(x1) & exists s1.(Theme(s1,x1) & a_white(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_wear(e1))