A girl in a red and black striped shirt sits on a brick wall in front of a tropical plant.
A girl is waiting for her father
Sentence 1 gives no specific reason why the girl would be sitting, whereas Sentence 2 tells us that she is waiting for her father.
exists e1 s1 s2 s3 s4 x1 x2 x3 x4 x5 x6.(in(e1,x5) & of(x5,x6) & n_plant(x6) & a_tropical(s4) & Theme(s4,x6) & n_front(x5) & on(e1,x3) & n_wall(x3) & of(x3,x4) & n_brick(x4) & Actor(e1,x1) & v_sit(e1) & in(x1,x2) & n_shirt(x2) & a_striped(s3) & Theme(s3,x2) & a_black(s2) & Theme(s2,x2) & a_red(s1) & Theme(s1,x2) & n_girl(x1))
exists e1 x1 x2.(for(e1,x2) & n_father(x2) & of(x2,x1) & n_female(x1) & Actor(e1,x1) & v_wait(e1) & n_girl(x1))