Complex sentence: The Glasgow Haskell Compiler (or GHC) is an open source native code compiler for the functional programming language Haskell which was originally developed at the University of Glasgow, primarily by Simon Peyton Jones and Simon Marlow.
Split into simpler sentences: The Glasgow Haskell Compiler (or GHC) is an open source native code compiler for the functional programming language Haskell. It was originally developed at the University of Glasgow primarily by Simon Peyton Jones and Simon Marlow.