sentences:  Over the years, however, for various reasons, a few notable strips changed syndicates.AP Newsfeatures closed down in 1961 and McNaught Syndicate closed down in 1989, prompting a number of strips to end their runs or move to other syndicates.Sometimes — as in the case of strips like "The World's Greatest Superheroes" or "Poor Arnold's Almanac" — a strip took a long hiatus and when it returned to syndication it was with a new company.