Premise: Karenga, Kwanzaa's creator, has also written two books on the celebration,  Origin, Concepts, Practice and The African American Celebration of  A Celebration of Family, Community and Culture . And Anna Day Wilde describes how the holiday gained popularity in Mainstreaming Kwanzaa, in Public Interest , No.
Hypothesis: Karenga created the holiday of Kwanzaa. 
Label: entailment