November  UTC Sorry but I prefer the former    double edit conflict Wikipedia policy applies to editing articles See WPBURDEN Any material lacking a reliable source may be removed but editors may object if you remove material without giving them sufficient time to provide references If you want to request a source for an unsourced statement consider tagging a sentence by adding the  template a section with  or the article with  or  Alternatively you may leave a note on the talk page requesting a source or you may move the material to the talk page Per the above and WPPEACOCK I cant see any justification for not changing The s in New York City heralded the triumph of American abstract expressionism to In the s abstract expressionism developed in NYC   Additionally the article at the moment is unbalanced The Renaissance gets a fraction of the space of Abstract Expressionism for example