What is associated with: by their last names it looks like the actors seen here partnered in 1997 were actors under aliases?

Based on the clue 'by the title its what keats la belle dame was sans', what is the answer? What is associated with: by the uaw in flint december 1936 to february 1937? What is associated with: by the year 1000 at least 25000 scandinavians had settled on this north atlantic island? What is associated with: by the year 2000 a species of this tree thats resistant to that dreaded dutch disease should b… Based on the clue 'by their names its the frequency of the news in da...', what is the answer? Based on the clue 'by their names its the frequency of the news in da...', what is the answer? Based on the clue 'by their shows title linda cardellini james franc...', what is the answer? What is associated with: by then living in the us he was offered the presidency of israel in 1952?