A woman with white pants is exercising.
A lady is running.
Exercising includes many other forms of working out (lifting weights and etc.), not only running.
exists e1 s1 x1 x2.(Actor(e1,x1) & v_exercise(e1) & with(x1,x2) & n_pants(x2) & a_white(s1) & Theme(s1,x2) & n_woman(x1))
exists e1 x1.(Actor(e1,x1) & v_run(e1) & n_lady(x1))