argue that a gas phase progenitor molecule for C3H is unlikely to exist within the ionopause and suggest that desorption from circumnuclear CHON dust grains may have instead produced the observed C3H .
VERB SCONJ DET NOUN NOUN NOUN NOUN ADP PROPN AUX ADJ PART VERB ADP DET NOUN CCONJ VERB SCONJ NOUN ADP NOUN PROPN NOUN NOUN AUX AUX ADV VERB DET ADJ PROPN .