<informationTable xmlns="http://www.sec.gov/edgar/document/thirteenf/informationtable">		<infoTable>
			<nameOfIssuer>Arris Group Inc New</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>04270V106</cusip>
			<value>300497</value>
			<shrsOrPrnAmt>
				<sshPrnamt>10663500</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>2</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>10663500</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>Facebook Inc</nameOfIssuer>
			<titleOfClass>CL A</titleOfClass>
			<cusip>30303M102</cusip>
			<value>1520</value>
			<shrsOrPrnAmt>
				<sshPrnamt>25231</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>25231</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>Foundation Medicine Inc</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>350465100</cusip>
			<value>79133</value>
			<shrsOrPrnAmt>
				<sshPrnamt>2444652</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>2444652</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
</informationTable>
