"Event Id"|"Underlying"|"Symbol"|"Exchange"|"Type"|"Start Datetime"|"End Datetime"|"Average Bid Size"|"Average Ask Size"|"Average Spread" "201812273100098"|"CLBS"|"CLBS_190118C4."|"AMEX"|"Straddle"|"12/27/18 10:05:05.000"|"12/27/18 10:47:20.000"|1|2|4.89