A group of girls are standing with rollerblades on while a man is lifting his leg next to them.
the girls are standing.
The girls are standing in both sentences, so there is no contradiction here.
exists e1 p1 s1 x1 x2 x3 x5.(exists e2 x4 x6.(Theme(e2,x5) & Actor(e2,x4) & v_lift(e2) & to(x6,x1) & next(x5,x6) & n_thing(x6) & n_man(x4)) & n_thing(x1) & n_leg(x5) & of(x5,x1) & n_male(x1) & while(e1,p1) & a_on(s1) & Manner(e1,s1) & with(e1,x3) & n_rollerblade(x3) & Actor(e1,x1) & v_stand(e1) & of(x1,x2) & n_girl(x2) & n_group(x1))
exists e1 x1.(n_girl(x1) & Actor(e1,x1) & v_stand(e1))