The lady at the gym is lifting weights.
A woman in a blue shirt is lifting barbells.
Just because the lady at the gym is lifting weights does not imply that a woman in a blue shirt is lifting barbells.
exists e1 x1 x2 x3.(n_gym(x2) & n_lady(x1) & Theme(e1,x3) & Actor(e1,x1) & v_lift(e1) & n_weight(x3) & at(x1,x2))
exists e1 s1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_lift(e1) & n_barbell(x3) & in(x1,x2) & n_shirt(x2) & a_blue(s1) & Theme(s1,x2) & n_woman(x1))