Search the board for 'pagination', 'split on word', 'split after word', etc. See if you can't find some relevant information - this type of topic has been covered many times in the past.
Then, if you still can't get it, you might want to give us more information... where is this 'string' coming from? A local file? Database? ...? Either way, if you know how to get the data, and you search for 'pagination' on the board, you should be able to put something together. If not, show us what you tried and we'll go from there.