There is provided {HEAD ~ a process} and a catalyst for hydrocracking hydrocarbons, such as {TAIL ~ gas oils} 
There is provided { HEAD ~ a process } and a catalyst for hydrocracking hydrocarbons , such as { TAIL ~ gas oils }
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL