// first read MC information (if present)
std::map<int,int> mcLabels;
for (const AliHLTComponentBlockData* pBlock=GetFirstInputBlock(kAliHLTDataTypeTrackMC|kAliHLTDataOriginTPC);
pBlock!=NULL; pBlock=GetNextInputBlock()) {
// first read MC information (if present)
std::map<int,int> mcLabels;
for (const AliHLTComponentBlockData* pBlock=GetFirstInputBlock(kAliHLTDataTypeTrackMC|kAliHLTDataOriginTPC);
pBlock!=NULL; pBlock=GetNextInputBlock()) {