A father and son explore a rocky shore, as father teaches son basic snorkel techniques.
they are talking loud
There is no implication that they are even talking, and certainly not that they are talking loud.
exists e1 p1 s1 x1 x2 x3 x4.(exists e2 s2 x5 x6 x7 x8.(Recipient(e2,x8) & Theme(e2,x6) & Actor(e2,x5) & v_teach(e2) & n_son(x8) & n_technique(x6) & of(x6,x7) & n_snorkel(x7) & a_basic(s2) & Theme(s2,x6) & n_father(x5)) & as(e1,p1) & Theme(e1,x4) & Actor(e1,x1) & v_explore(e1) & n_shore(x4) & a_rocky(s1) & Theme(s1,x4) & n_son(x3) & n_father(x2) & subset_of(x3,x1) & subset_of(x2,x1))
exists e1 p1 x1.(n_thing(x1) & exists s1.(Theme(s1,x1) & a_loud(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_talk(e1))