Assertion: booth | /r/CapableOf | promise his mother
Facets:
value: at the outbreak of war
type: TEMPORAL
Source sentences:
text: Booth had promised his mother at the outbreak of war that he would not enlist as a soldier, but he increasingly chafed at not fighting for the South, writing in a letter to her, "I have begun to deem myself a coward and to despise my own existence.