code: void remove(int numberOfParagraph, int startOfSentencePosition) {
      for(int i = 0; i < entries.size(); i++) {
        if(entries.get(i).numberOfParagraph == numberOfParagraph
          && entries.get(i).startOfSentencePosition == startOfSentencePosition) {
          entries.remove(i);
          return;
        }
      }
    }
docs: Remove a cache entry for a sentence