Simplify the following text for a Grade 10 native English-speaking person.
Original: Other members of the SingTel group include the three wholly owned subsidiaries of SingNet , a wholly owned internet service provider , SingTel Digital Media Pte Ltd ( STDM ) which owns content portal , insing.com and NCS , an information technology and communications engineering services provider .
Simplified: SingTel Digital Media Pte Ltd ( STDM ) which owns content portal , insing.com , is a wholly owned subsidiary of SingTel .