A male is sitting in a chair with a blue surgical mask on.
A man has a contagious disease.
Not all people who wear surgical masks have a contagious disease.
exists e1 s1 s2 s3 x1 x2 x3.(a_on(s3) & Manner(e1,s3) & with(e1,x3) & n_mask(x3) & a_surgical(s2) & Theme(s2,x3) & a_blue(s1) & Theme(s1,x3) & in(e1,x2) & n_chair(x2) & Actor(e1,x1) & v_sit(e1) & n_male(x1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_disease(x2) & a_contagious(s1) & Theme(s1,x2) & n_man(x1))