Original sentence: As part of the ongoing Sri Lankan civil war, a shrimp culture farm was owned by Serendip Seafood Limited, a business located in Mahiladiththivu and owned by Hong Kong based American investors in conjunction with local partners was attacked and destroyed in 1987.The University Teachers for Human Rights, a local human rights organisation, alleges that the Special Task Force, an elite special forces unit of the Sri Lanka Police specialising in counter-terrorist and counter-insurgency operations, perpetrated the massacre
Edited sentence: As part ofthe ongoing Sri Lankan civil war, a shrimp culture farm was owned by Serendip Seafood Limited, a business located in Mahiladiththivu and owned by Hong Kong based American investors in conjunction with local partners was attacked and destroyed in 1987.It is alleged that the Special Task Force, an elite special forces unit of the Sri Lanka Police specializing in counter-terrorist and counter-insurgency operations,  perpetrated the massacre