Simplify the following text for a Grade 4 native English-speaking person.
Original: The National Women 's Hockey League ( NWHL ) was an ice hockey league in Canada that was formed in 1999 and ended in 2007 .
Simplified: The National Women 's Hockey League ( NWHL ) was a women 's ice hockey league . This League was in service between 1999 and 2007 .