Riverside Line
Metrolink's Riverside Line is a commuter rail line running from Los Angeles Union Station in Downtown Los Angeles to Riverside along the Union Pacific Railroad . 
<triplet> Metrolink <subj> Riverside Line <obj> has part <subj> commuter rail <obj> instance of <triplet> Riverside Line <subj> Metrolink <obj> operator <subj> Los Angeles Union Station <obj> terminus <triplet> Los Angeles Union Station <subj> Riverside Line <obj> connecting line