A masked doctor wearing glasses is performing a surgery.
The doctor is in a hospital performing surgery
A doctor performing surgery implies is in a hospital.
exists e2 e1 s1 x1 x2 x3 x4.(Theme(e2,x4) & Actor(e2,x1) & v_perform(e2) & n_surgery(x4) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_glass(x3) & (x1 = x2) & n_doctor(x1) & a_masked(s1) & Theme(s1,x1))
exists p1 x1.(n_doctor(x1) & exists e1 x2 x3 x4.(in(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_perform(e1) & n_surgery(x4) & (x2 = x3) & n_hospital(x2)))