Online social capital is nascent, in definition and scope. Our preliminary work [33] attempted to examine online social capital in two extremes ,high and low ,and different from this work , it is limited to the extraction of basic features ,derived from the content and sentiment, for classification among capital groups. [23] propose a broad definition of social capital—acombination of user profile information, factors reflecting openness to new acquaintances ,online activities such as frequency of posting or commenting and the contribution of the user to relationships