(S (S (PP (IN In) (BASENP (NN addition))) (COMMA ,) (S (NP (BASENP (DT a) (JJ teenage) (NN prisoner)) (PRN (COMMA ,) (BASENP (NNP Liam) (NNP Ashley)) (COMMA ,))) (VP (VBD was) (VP (ADVP (RB recently)) (VP (VP (VP (VBN strangled) (PP (TO to) (BASENP (NN death)))) (PP (IN in) (BASENP (DT a) (NN prison) (NN van)))) (PP (IN by) (BASENP (DT a) (ADJP (RB much) (JJR older)) (NN adult) (NN prisoner)))))))) (PERIOD .))