Political rally of various generations.
The rally is political.
This political rally includes various generations.
exists s1 s2 x1 x2.(a_topic(x1) & of(x1,x2) & n_generation(x2) & a_various(s2) & Theme(s2,x2) & n_rally(x1) & a_political(s1) & Theme(s1,x1))
exists s1 x1.(n_rally(x1) & Theme(s1,x1) & a_political(s1))