Assertion: ethane | /r/HasProperty | based on spot
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Source sentences:
text: According to data from En*Vantage Inc., as of last week propane was the most preferred feedstock at high-severity cracking conditions, yielding a spot net margin of 8.5cts/lb. versus 7.3cts/lb. for ethane (based on a spot Mont Belvieu ethylene price of 15.5cts/lb.)