Original sentence: Examples of facilities operating on the SASE FEL principle include the Free electron LASer in Hamburg (FLASH), the Linac Coherent Light Source (LCLS), at the SLAC National Accelerator Laboratory, and the European x-ray free electron laser
Edited sentence: Examples of facilities operating on the SASE FEL principle include the Free electron LASer in Hamburg (FLASH), the Linac Coherent Light Source (LCLS) at the SLAC National Accelerator Laboratory, and the European x-ray free electron laser