With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Same-sex marriage is legal in Guam.
text_B: A high-occupancy vehicle lane -LRB- also known as an HOV lane , carpool lane , diamond lane , 2 + lane , and transit lane or T2 or T3 lanes in Australia and New Zealand -RRB- is a restricted traffic lane reserved at peak travel times or longer for the exclusive use of vehicles with a driver and one or more passengers , including carpools , vanpools , and transit buses .. traffic lane. traffic lane. peak travel times. rush hour. carpool. carpool. transit. public transit. The normal minimum occupancy level is 2 or 3 occupants .. Many jurisdictions exempt other vehicles , including motorcycles , charter buses , emergency and law enforcement vehicles , low-emission and other green vehicles , and / or single-occupancy vehicles paying a toll .. single-occupancy vehicles paying a toll. high-occupancy toll lane. HOV lanes are normally created to increase average vehicle occupancy and persons traveling with the goal of reducing traffic congestion and air pollution , although their effectiveness is questionable .. traffic congestion. traffic congestion. air pollution. air pollution. Regional and corporate-sponsored vanpools , carpools , and rideshare communities give commuters a way to increase occupancy .. rideshare. rideshare. For places without such services , online rideshare communities can serve a similar purpose .. rideshare. rideshare. Slugging lines are common in some places , where solo drivers pick up a passenger to share the ride and allow use of the HOV lane .. Slugging lines. Slugging. High-occupancy toll lanes -LRB- HOT lanes -RRB- have been introduced in the United States to allow solo driver vehicles to use the lane on payment of a variable fee , which usually varies with demand .
not_related.