Original sentence: Public private partnerships such as Metronet have been used in the delivery of public services and infrastructure, private finance initiatives have been used in the construction  and maintenance of public services and infrastructure and the voluntary sector has been integrated into parts of the welfare state
Edited sentence: Public private partnerships such as Metronet have been used in the delivery of public services and infrastructure, private finance initiatives have been used in the construction  and maintenance of public services and infrastructure and the Social enterprise sector and voluntary sector has been integrated into parts of the welfare state