Task: Pos Tagging
Input (English): Sentence: With due consideration for the limits of precision in assessing , expected rate of change in ossification {{ of }} girls age 2 years , and the known variations in rate of ossification of these children as described in our preceding paper in the Supplement , each arrow with a `` shaft length '' of four months or less was selected as indicating `` same schedule '' at Onset and Completion , for this particular epiphysis . 
Word: of
Output (English): ADP