Assertion: caliph | /r/HasProperty | known for their exceptional piety
Facets:
value: to the "umma,"
type: TRANSITIVE-OBJECT
value: to muslim community
type: TRANSITIVE-OBJECT
Source sentences:
text: The first four caliphs — Abu Bakr, Umar, Uthman and Ali — were all known for their exceptional piety and dedication to the "umma," or Muslim community.