A nurse in a blue shirt and a purple shirt talking.
A nurse is talking.
Saying that they are wearing a blue shirt and purple shirt is a way of specifying that it's a nurse.
exists e1 s1 s2 s3 x1 x2 x3 x4.(a_topic(s1) & subset_of(x3,s1) & Actor(e1,x4) & v_talking(e1) & (x3 = x4) & n_shirt(x3) & a_purple(s3) & Theme(s3,x3) & subset_of(x1,s1) & in(x1,x2) & n_shirt(x2) & a_blue(s2) & Theme(s2,x2) & n_nurse(x1))
exists e1 x1.(Actor(e1,x1) & v_talk(e1) & n_nurse(x1))