With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Malcolm Young co-founded AC/DC in Australia.
text_B: The SEPTA Regional Rail system consists of commuter rail service on 13 branches to more than 150 active stations in Philadelphia , Pennsylvania , and its suburbs and satellite cities .. SEPTA. SEPTA. Philadelphia. Philadelphia. commuter rail. commuter rail. Pennsylvania. Pennsylvania. satellite cities. satellite city. Service on most lines operates from 5 :30 a.m. to midnight .. It is the fifth-busiest commuter railroad in the United States and busiest outside of the New York and Chicago metropolitan areas .. fifth-busiest commuter railroad. List of United States commuter rail systems by ridership. New York. New York metropolitan area. In 2016 , Regional Rail had an average of 132,000 daily riders .. The core of the Regional Rail system is the Center City Commuter Connection , composed of three Center City stations in the `` tunnel '' corridor  : the above-ground upper level of 30th Street Station , the underground Suburban Station , and Jefferson Station -LRB- formerly Market East Station -RRB- .. Center City Commuter Connection. Center City Commuter Connection. Center City. Center City, Philadelphia. 30th Street Station. 30th Street Station. Suburban Station. Suburban Station. Jefferson Station. Jefferson Station ( Philadelphia ). All trains stop at these Center City stations ; most also stop at Temple University station on the campus of Temple University in North Philadelphia .. Philadelphia. Philadelphia. Center City. Center City, Philadelphia. Temple University station. Temple University ( SEPTA station ). Temple University. Temple University. Operations are handled by the SEPTA Railroad Division .. SEPTA. SEPTA. Of the 13 branches , seven were originally owned and operated by the Pennsylvania Railroad -LRB- PRR -RRB- -LRB- later Penn Central -RRB- , and six by the Reading Company .. Pennsylvania. Pennsylvania. Pennsylvania Railroad. Pennsylvania Railroad. Penn Central. Penn Central. Reading Company. Reading Company. The PRR lines terminated at Suburban Station ; the Reading lines at Reading Terminal .. Suburban Station. Suburban Station. Reading Terminal. Reading Terminal. In November 1984 , the Center City Commuter Connection united the two systems , turning the two terminal stations -LRB- Reading Terminal having been replaced by the Jefferson Station -RRB- into through-stations .. Center City Commuter Connection. Center City Commuter Connection. Center City. Center City, Philadelphia. Jefferson Station. Jefferson Station ( Philadelphia ). Reading Terminal. Reading Terminal. Most inbound trains from one line continue on as outbound trains on another line .. -LRB- Some limited or express trains , and all trains on the Cynwyd Line , terminate on one of the stub-end tracks at Suburban Station . -RRB-. Suburban Station. Suburban Station. Cynwyd Line. Cynwyd Line
not_related.