premise: Two doctors perform surgery on patient.
hypothesis: Doctors are performing surgery.
explanation_1: TWO  DOCTORS CAN ALSO BE DOCTORS.
explanation_2: Two doctors are doctors, and surgery on patient is performing surgery.
explanation_3: If there are two, then there are doctors, plural.
premise_logic: exists e1 x1 x2 x3.(on(e1,x3) & n_patient(x3) & Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_surgery(x2) & n_doctor(x1) & card_eq_2(x1))
hypothesis_logic: exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_surgery(x2) & n_doctor(x1))