Task: Pos Tagging
Input (English): Sentence: The tremendous emphasis on the 5 in the Lo Shu square -- for purely mathematical reasons -- and the fact that this number so neatly symbolized the heart and center of the universe , could well explain why the Old Chinese seem {{ to }} have so revered the number 5 , and why they put so much stress on the concept of Centrality . 
Word: to
Output (English): PRT