Question: Which one was established first, Pioneer Energy or Hanning Elektro-Werke?
Sentence (from "Hanning Elektro-Werke"): Hanning Elektro- Werke GmbH und Co. KG,( limited partnership with a limited liability company as general partner) a German family- owned company, was founded in 1947 by Robert Hanning and is part of the international production network.
Relevant evidence: Yes