sentences:  New trains of the MP 14 series will replace the current fleet of Line 14, because of the extensions of the Grand Paris Express project.The current fleet of 21 MP 89 CA and 11 MP 05 trains will transfer to the newly-automated Line 4, where it will be joined by 20 MP 14 trains to meet the current peak vehicle requirements.The 52 MP 89 CC trains that currently serve Line 4 would then be shortened from six to five cars, and transfer to Line 6 to replace the MP 73 trains.