The postwar immigrants founded the Belarusian Congress Committee of America here in 1951 .
The immigrants of the postwar period founded the Belarusian Congress Committee of America here in 1951 .

Are these two sentences paraphrases of each other?
yes

By then , three-quarters of the slaves in Delaware had been freed , and a high proportion of slaves in Maryland .
By then , three-quarters of the slaves had been liberated in Maryland , and a high proportion of slaves in Delaware .

Are these two sentences paraphrases of each other?
no

Batman ( Bruce Wayne ) and Belson Dick 's kidnapping investigate Batman back in Gotham and learn that Barbara is also missing .
Back in Gotham , Batman ( Bruce Wayne ) and Belson investigate Dick 's kidnapping and learn that Barbara is also missing .

Are these two sentences paraphrases of each other?
no

Emerson offered a foundation year in Anthroposophy followed by specialised courses in Waldorf education , Biodynamics and later other courses .
Emerson offered a year of foundation in Anthroposophy , followed by specialised courses in Waldorf education , biodynamics and later other courses .

Are these two sentences paraphrases of each other?
yes