A man with a purple bandanna is clad in police riot gear, including a helmet and a vest marked "Police".
A police officer protects protesters.
Not every man in police riot gear is a police officer that protects protesters.
exists e1 s1 s2 s3 x1 x2 x3 x4 x5 x6 x7 x8 x9.(in(e1,x3) & include(x3,x6) & subset_of(x8,x6) & n_police(x8) & a_''(s3) & Theme(s3,x8) & a_marked(s2) & Theme(s2,x8) & of(x8,x9) & n_vest(x9) & subset_of(x7,x6) & n_helmet(x7) & n_gear(x3) & of(x3,x5) & n_riot(x5) & of(x3,x4) & n_police(x4) & Theme(e1,x1) & v_clothe(e1) & with(x1,x2) & n_bandanna(x2) & a_purple(s1) & Theme(s1,x2) & n_man(x1))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_protect(e1) & n_protester(x3) & n_officer(x1) & of(x1,x2) & n_police(x2))