source: The islands of the Philippines are inhabited by a number of different ethnolinguistic groups, the majority of whose own languages are Austronesian in origin.
target: The islands of the Philippines are inhabited by a number of different ethnolinguistic groups. The majority of their own languages are Austronesian in origin.
references: The islands of the Philippines are inhabited by a number of different ethnolinguistic groups. The majority of their own languages are Austronesian in origin.