Task: Pos Tagging
Input (English): Sentence: Unfortunately , our partners from 1991 are not willing to shoulder the burden of this new venture , {{ which }} in its upcoming phase may cost the sum of 100 billion to 200 billion dollars ( $ 100,000,000,000 - $ 200,000,000,000 ) , both in the initial acquisition and in long - term management . 
Word: which
Output (English): WDT