In 2017 May release for CMS108 & CMS190 numerator logic it is mentioned that the numerator criteria may satisfy the union like mentioned below.

OR: Union of:  
"Assessment, Performed: VTE Risk Assessment (result: Low Risk)"  
"Laboratory Test, Performed: INR (result > 3.0 )"  
"Medication, Administered: Unfractionated Heparin (route: Intravenous route)"  
"Medication, Administered: Direct Thrombin Inhibitor"  
"Medication, Administered: Glycoprotein IIb/IIIa Inhibitors"  
starts during ("Encounter, Performed: Emergency Department Visit" <= 1 hour(s) ends before or concurrent with start of "Occurrence A of Encounter, Performed: ICU Admission or Transfer" ) 

As part of 2017 May release we were capturing evidences for Assessment, Performed, Laboratory Test, Performed & Medication, Administered if either any or all of them are present but as per the CQL latest draft measure release this condition has been replaced by the 'return' operator as mentioned below:

( ["Assessment, Performed": "Risk for venous thromboembolism"] VTERiskAssessment
where VTERiskAssessment.result in "Low Risk"
)
union ( ["Laboratory Test, Performed": "INR"] INRLabTest
where INRLabTest.result > 3.0
return "Assessment, Performed"

{ id: INRLabTest.id, authorDatetime: INRLabTest.resultDatetime }

)
union ( ( ["Medication, Administered": "Unfractionated Heparin"] UnfractionatedHeparin
where UnfractionatedHeparin.route in "Intravenous route"
)
union ["Medication, Administered": "Direct Thrombin Inhibitor"]
union ["Medication, Administered": "Glycoprotein IIb/IIIa Inhibitors"] AnticoagulantMedication
return "Assessment, Performed"

{ id: AnticoagulantMedication.id, authorDatetime: start of AnticoagulantMedication.relevantPeriod }

)

Our question is should we capture the evidences as we did previously or do we need to capture only the evidences from Assessment, Performed and not return any evidence for Laboratory Test, performed and Medication, Administered , kindly clarify.