The company was then the St. Louis and Cairo Railroad , the narrow gauge acquired .
The company acquired the St. Louis and Cairo Railroad , which was narrow gauge .

Are these two sentences paraphrases of each other?
no

In the American Football League for the Washington Redskins and the National Football League for the Los Angeles Chargers , a former American football defensive was finished .
was a former American football defensive end in the American Football League for the Washington Redskins and in the National Football League for the Los Angeles Chargers .

Are these two sentences paraphrases of each other?
yes

The Indus cities are renowned for their urban planning , baked brick houses , elaborate drainage systems , water supply systems and collections of large non-residential buildings .
The Indus cities are noted for their urban planning , baked brick houses , elaborate drainage systems , water supply systems , and clusters of large non-residential buildings .

Are these two sentences paraphrases of each other?
yes

Stevens was a Republican when the party was founded , and became a Delegate to the Republican National Conventions in 1860 and 1868 .
Stevens was a Republican when the party was founded , and was a delegate to the Republican National Conventions in 1860 and 1868 .

Are these two sentences paraphrases of each other?

no