Assuming isgro is required, and robby is required, and robert is required, and m is required, and d is required, and gunstream is required, the following result was found.
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26.7 101-200 65 62 54 15.0 40.0 0.0 201-400 58 56 48 12.0 40.0 0.0 401 + 47 41 27 15.0 30.3 0.0 authors: Robert M. Isgro and Robby D. Gunstream author_ids: 1355 authors: Robert M. Isgro and Robby D. Gunstream author_ids: 1355