ner_tags: B-Person O O O O B-Organization B-Grant I-Grant I-Grant B-Organization O B-Grant O O B-Organization I-Organization I-Organization I-Organization O O O O O O O O O O O O O O O O O O O O O
tokens: BDM gratefully acknowledges support from NASA Fermi grant NNX14AQ68G, NSF grant AST-1410950, and the Alfred P. Sloan Foundation. We thank the anonymous reviewer for several helpful suggestions and for emphasizing the applicability of our results to Type IIn supernovae.