People in a courtyard plaza are sitting and standing.
People are gathered for a mayors speech in a courtyard plaza
Just because people are sitting and standing in a courtyard plaza  doesn't mean they are gathered for a mayors speech.
exists e1 e2 x1 x2 x3 x4 x5 x6.(Actor(e2,x4) & v_stand(e2) & in(x4,x5) & n_plaza(x5) & of(x5,x6) & n_courtyard(x6) & n_people(x4) & Actor(e1,x1) & v_sit(e1) & in(x1,x2) & n_plaza(x2) & of(x2,x3) & n_courtyard(x3) & n_people(x1))
exists e1 x1 x2 x3 x4 x5.(in(e1,x4) & n_plaza(x4) & of(x4,x5) & n_courtyard(x5) & for(e1,x2) & n_speech(x2) & of(x2,x3) & n_mayor(x3) & Theme(e1,x1) & v_gather(e1) & n_people(x1))