id	domain	url
fumecheng-12155	doi.org	https://doi.org/10.22190/fume230914041f
fumecheng-12155	www.statista.com	www.statista.com/statistics/1255048/punctuality-regional-passenger-rail-services-europe-by-country
fumecheng-12155	international-railway-safety-council.com	https://international-railway-safety-council.com/safety-statistics