The lady in blue is wearing a mask while she works on a patient.
The man in blue is wearing a mask while she works on a patient.
A lady and a man are different genders.
exists e1 p1 x1 x2 x3.(n_female(x1) & n_lady(x1) & exists e2 x4.(on(e2,x4) & n_patient(x4) & Actor(e2,x1) & v_work(e2)) & while(e1,p1) & Theme(e1,x3) & Actor(e1,x1) & v_wear(e1) & n_mask(x3) & in(x1,x2) & n_blue(x2))
exists e1 p1 x1 x2 x3.(n_female(x1) & n_man(x1) & exists e2 x4.(on(e2,x4) & n_patient(x4) & Actor(e2,x1) & v_work(e2)) & while(e1,p1) & Theme(e1,x3) & Actor(e1,x1) & v_wear(e1) & n_mask(x3) & in(x1,x2) & n_blue(x2))