[Tutor] Finding items in a list

[Emily Patek]

Hi - 
I am trying to break apart a list into several smaller lists based on repeating nearly identical entries.  For example, every so often there is the word CLUSTER with a number after it, like CLUSTER 1.  I can find them one by one, but would like to
do a while loop for while item in list = CLUSTER X.  Is there a key that I can put in that means "any text that comes after" that would go from cluster to cluster without my typing in each cluster and number?  I am a very beginner programmer and am
trying to parse a file of gene-related information that is in a not-so-easy format.  I put it into a list based on lines through the splitlines() method.  I also thought about splitting the text by CLUSTER and then making each item of the list into
a string that I could then split, but couldn't get that to work either...

Thanks! 
Emily