A singer performing live in concert.
A singer is performing live in a country music concert.
Not all concerts are country music concerts.
exists e1 s1 x1 x2 x3.(a_topic(x1) & in(e1,x3) & n_concert(x3) & a_live(s1) & Manner(e1,s1) & Actor(e1,x2) & v_perform(e1) & (x1 = x2) & n_singer(x1))
exists e1 s1 x1 x2 x3 x4.(in(e1,x2) & n_concert(x2) & of(x2,x4) & n_music(x4) & of(x2,x3) & n_country(x3) & a_live(s1) & Manner(e1,s1) & Actor(e1,x1) & v_perform(e1) & n_singer(x1))