Time ambulance arrived at scene:TmStp:Pt:Ambulance transport:Qn
time ambulance arrived at scene:tmstp:pt:ambulance transport:qn
Time ambulance arrived at scene:Time Stamp-Date and Time:To identify measures at a point in time:Ambulance transport:Quantitative
time ambulance arrived at scene:time stamp-date and time:to identify measures at a point in time:ambulance transport:quantitative