A medical room with a man dressed in blue.
A doctor prepares to perform a surgery.
A man dressed in blue need not be a doctor and it does not imply he prepares to perform a surgery.
exists e1 s1 s2 x1 x2 x3 x4.(a_topic(x1) & with(x1,x2) & Theme(e1,s2) & Theme(s2,x4) & a_blue(s2) & Theme(e1,x3) & v_dress(e1) & (x2 = x3) & n_man(x2) & n_room(x1) & a_medical(s1) & Theme(s1,x1))
exists e1 p1 x1.(Topic(e1,p1) & Actor(e1,x1) & v_prepare(e1) & exists e2 x2.(Theme(e2,x2) & Actor(e2,x1) & v_perform(e2) & n_surgery(x2)) & n_doctor(x1))