The lead singer visited with his band members and had the guitarist sing along with the song.
The lead singer teaches the guitarist to sing.
The lead singer visited with his band members and had the guitarist sing along with the song does not indicate that the lead singer teaches the guitarist to sing.
exists e4 e1 e3 e2 x1 x2 x3 x4 x5 x6 x7 x8 x9 x10.(n_song(x10) & n_guitarist(x9) & n_singer(x1) & of(x1,x7) & n_lead(x7) & n_song(x6) & n_member(x4) & of(x4,x5) & n_band(x5) & of(x4,x1) & n_male(x1) & of(x1,x2) & n_lead(x2) & with(e4,x10) & r_along(e4) & Actor(e4,x1) & v_sing(e4) & Theme(e3,x9) & Actor(e3,x8) & v_have(e3) & (x1 = x8) & with(e2,x6) & r_along(e2) & Actor(e2,x1) & v_sing(e2) & with(e1,x4) & Theme(e1,x3) & v_visit(e1) & (x1 = x3))
exists e1 p1 x1 x2 x3 x4.(n_guitarist(x4) & n_singer(x1) & of(x1,x3) & n_lead(x3) & of(x1,x2) & n_lead(x2) & Topic(e1,p1) & exists e2.(Actor(e2,x1) & v_sing(e2)) & Theme(e1,x4) & Actor(e1,x1) & v_teach(e1))