Task: Pos Tagging
Input (English): Sentence: But during nighttime hours the skywave radiations are reflected from the ionosphere , thereby creating the possibility of one station's rendering service , via skywave , at a much greater distance than it can through its groundwave signal , and at the same time vastly complicating the interference problem because of the still greater distance over which these skywave signals may cause interference to the {{ signals }} of stations on the same and closely adjacent frequencies . 
Word: signals
Output (English): NOUN