(S (S (ADVP (RBR Earlier) (BASENP (DT that) (NN afternoon))) (COMMA ,) (S (BASENP (NNS measurements)) (VP (VBD had) (VP (VBN been) (VP (VBN taken) (S (VP (TO to) (VP (VB determine) (BASENP (PRPD its) (NN stability)))))))))) (PERIOD .))