A female student concentrates on her schoolwork.
A student is at school working on her schoolwork.
Concentrates on her schoolwork does not necessarily mean at school.
exists e1 s1 x1 x2.(on(e1,x2) & n_schoolwork(x2) & of(x2,x1) & n_female(x1) & Actor(e1,x1) & v_concentrate(e1) & n_student(x1) & a_female(s1) & Theme(s1,x1))
exists p1 x1 x4.(exists e1 x2 x3.(at(x1,x2) & on(e1,x4) & Actor(e1,x3) & v_work(e1) & (x2 = x3) & n_school(x2)) & n_schoolwork(x4) & of(x4,x1) & n_female(x1) & n_student(x1))