Assertion: river dolphin's prey | /r/HasProperty | prepared in way
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Source sentences:
text: Factors such as diet (captive dolphins are often fed a strict diet that may not include the prey they normal consume or be prepared in a way they would normally consume it), a closed environment (being separated from the wide and open ocean) and a lack of a strong social structure (being separated from family and potential friends) may all contribute to the shorter lifespan of captive dolphins.