A semi-nude mannequin is posed in the window.
A half nude mannequin is posed in the window.
Anything that is not fully nude, in this case half, is considered semi-nude
exists e1 s1 x1 x2.(n_window(x2) & in(e1,x2) & Theme(e1,x1) & v_pose(e1) & n_mannequin(x1) & a_semi-nude(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3.(n_window(x3) & in(e1,x3) & Theme(e1,x1) & v_pose(e1) & n_mannequin(x1) & a_nude(s1) & Theme(s1,x1) & of(x1,x2) & n_half(x2))