Such accounts assumed that if Theia had struck the proto- Earth head-on both planets would have been destroyed , creating a short-lived second asteroid belt between the orbits of Venus and Mars .
ADJ NOUN VERB SCONJ SCONJ PROPN AUX VERB DET X PROPN PRON DET NOUN AUX AUX AUX VERB , VERB DET ADJ ADJ NOUN NOUN ADP DET NOUN ADP PROPN CCONJ PROPN .