Task: Pos Tagging
Input (English): Sentence: On the other hand , the bright vision of the future has been directly stated in science fiction concerned with projecting ideal societies -- science fiction , of course , is related , if {{ sometimes }} distantly , to that utopian literature optimistic about science , literature whose period of greatest vigor in the late nineteenth and early twentieth centuries produced Edward Bellamy's Looking Backward and H. G. Wells's A Modern Utopia . 
Word: sometimes
Output (English): ADV