sentence2_structure: earth's shadow<>falls<>on the moon$$$the shadow<>causes<>a lunar eclipse<>When earth's shadow falls on the moon
sentence1: The Shadow of earth sometimes falls on the full moon only (earth comes in between sun and moon), and then it is lunar eclipse.
sentence2: When earth’s shadow falls on the moon, the shadow causes a lunar eclipse.
question: When Earth’s shadow falls on the Moon, the shadow causes a