A tour around the city with the tour guide on the speaker.
The guide's voice is amplified for those on the tour.
If there is a speaker, the voice is amplified.
exists x1 x2 x3 x4.(n_speaker(x4) & n_city(x2) & a_topic(x1) & with(x1,x3) & on(x3,x4) & n_guide(x3) & of(x3,x1) & n_tour(x1) & n_tour(x1) & around(x1,x2))
exists e1 x1 x2 x3.(n_tour(x3) & n_thing(x1) & n_voice(x2) & of(x2,x1) & n_guide(x1) & for(e1,x1) & on(x1,x3) & Theme(e1,x2) & v_amplify(e1))