Sentence:  In the last couple of years, it seems like the vast majority of stories posted are <WSD>MSRs</WSD>. You rarely see a slash story posted here anymore. 
Meaning of the word marked with <WSD> tags:  Mulder/Scully romance; a fanfic involving a romantic relationship between the characters (Fox Mulder) and (Dana Scully) of the "(The X-Files)".