High-Level Trigger path information HLT_Mu15_TkMu5_Onia (MuOniaParked dataset).
first seen online on run 202970 (/cdaq/physics/Run2012/7e33/v4.2/HLT/V1)
last seen online on run 209151 (/cdaq/special/25ns/v1.1/HLT/V2)
V1: (runs 202970 - 209151) seeded by: L1_SingleMu12er OR L1_SingleMu14er
See also the full list of triggers for CMS 2012 open data:Trigger information for 2012 CMS open data