Low natural gas liquids prices have persisted for over a year now, wreaking havoc on midstream companies. Some diverse outfits are able to mitigate losses with strong earnings from other segments. In this video, Fool.com contributor Aimee Duffy takes a look at Enterprise Products Partners' (EPD -1.27%) first-quarter results and discusses how NGL prices affected earnings, and how these prices have affected other midstream companies in the past.