Task: Pos Tagging
Input (English): Sentence: instead of suggesting a specific rate increase - 10 or 15 % , I think we should acknowledge that a " modest " increase may be necessary and may in fact be desirable - {{ but }} that the specific amount of increase should be reasoned and subject to well thought out evidence and hearings , not just determined by whim . 
Word: but
Output (English): CCONJ