A lady is looking at a specimen with a microscope.
A scientist sits down and gets to work.
Not every lady is a scientist. A lady is looking at a specimen with a microscope doesn't imply she sits down and gets to work.
exists e1 x1 x2 x3.(at(e1,x2) & with(x2,x3) & n_microscope(x3) & n_specimen(x2) & Actor(e1,x1) & v_look(e1) & n_lady(x1))
exists e1 e2 p1 p2 x1 x2.(Topic(e2,p2) & Actor(e2,x2) & v_get(e2) & exists e3.(Actor(e3,x2) & v_work(e3)) & n_scientist(x2) & exists s1.(Theme(s1,x1) & a_down(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_sit(e1) & n_scientist(x1))