A hiking tour for seniors on a clear day.
A senior hiking tour gets underway.
A hiking tour for senior isn't always a senior hiking. Nothing says it gets underway.
exists s1 x1 x2 x3 x4.(a_topic(x1) & for(x1,x3) & on(x3,x4) & n_day(x4) & a_clear(s1) & Theme(s1,x4) & n_senior(x3) & n_tour(x1) & of(x1,x2) & n_hiking(x2))
exists e1 s1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_get(e1) & n_underway(x3) & n_tour(x1) & of(x1,x2) & n_hiking(x2) & a_senior(s1) & Theme(s1,x1))