It seems most active late in the morning and early afternoon .
It seems to be most active in the late morning and early afternoon .

Are these two sentences paraphrases of each other?
yes

The website originally serves the market of Arizona , San Diego and Las Vegas and expanded to Atlanta in the autumn of 2006 .
The website originally served the market of Arizona , San Diego , and Las Vegas , and expanded to Atlanta in the fall of 2006 .

Are these two sentences paraphrases of each other?
yes

He attended preparatory school at the , and studied primary and secondary architecture at the ( IAVA ) .
He attended primary and secondary school at the university , and studied preparation architecture at the ( IAVA ) .

Are these two sentences paraphrases of each other?
no

The Barnarel River is a tributary of the River Stejioara in Romania .
The Barnarel River is a tributary of the Stejioara River in Romania .

Are these two sentences paraphrases of each other?
yes