Researchers have proposed systems to detect social power relations between participants of organizational email threads<cite> (Bramsen et al., 2011</cite>; Gilbert, 2012; , online forums (Danescu-NiculescuMizil et al., 2012; Biran et al., 2012; DanescuNiculescu-Mizil et al., 2013) , chats (Strzalkowski et al., 2012) , and off-line interactions such as presidential debates Nguyen et al., 2013) .