Input (grade 13): The North East MRT Line (NEL) is the third Mass Rapid Transit line in Singapore and the world's second longest fully-underground, automated and driverless, rapid transit line after Singapore's Circle MRT Line.
Output (grade 8): The North East MRT Line (NEL) was the third Mass Rapid Transit line in Singapore. It is the world's second longest fully-underground, automated and driverless, rapid transit line after Singapore's Circle MRT Line.