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A train (from Old French trahiner, from Latin trahere, "to pull, to draw") is a series of connected vehicles that run along a railway track and transport people or freight. Trains are typically pulled or pushed by locomotives (often known simply as "engines"), though some are self-propelled, such as multiple units or railcars.
History, Culture & Measurement
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trains rail freight passenger locomotives use also cars steam used many systems transport first railroad operate travel known railway diesel
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| coal | instance of | Freight trains remain important for the transport of bulk commodities | 0.80 | text |
| grain | instance of | Freight trains remain important for the transport of bulk commodities | 0.80 | text |
| as well as for reducing road traffic congestion caused by freight trucks.While conventional trains operate on relatively flat tracks with two rails | instance of | Freight trains remain important for the transport of bulk commodities | 0.80 | text |
| many specialized trains operate in significantly different ways | instance of | Freight trains remain important for the transport of bulk commodities | 0.80 | text |
| high-speed maglevs | instance of | Experimental trains | 0.80 | text |
| which use magnetic levitation to float above a guideway | instance of | Experimental trains | 0.80 | text |
| have been under development since the 1970s | instance of | Experimental trains | 0.80 | text |
| can reach speeds higher than even the fastest conventional trains | instance of | Experimental trains | 0.80 | text |
| natural gas | instance of | Trains that use alternative fuels | 0.80 | text |
| hydrogen are a 21st-century development | instance of | Trains that use alternative fuels | 0.80 | text |
| operating switches | instance of | though the term is used today to refer to crew members who perform tasks | 0.80 | text |
| coupling | instance of | though the term is used today to refer to crew members who perform tasks | 0.80 | text |
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