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<http://webisa.webdatacommons.org/343249363>	<http://www.w3.org/ns/prov#value>	"nt. >>> a milestone today for san francisco's muni. the public transit system is turning 100 years old and there is a celebration designed to benefit everyone. cbs 5 reporter cate caugiran is in san francisco to give us some history. >> reporter: 100 years ago the first muni line started running from geary to 33rd avenue. today, muni railway serves about 200 million passengers a year. it has a netw" .