Previous Proposals and Problems Regarding the key question, two main streams of proposals are basically discernible. One stream maintained that both NP1 and NP2 are subject, trying to define various notions of subject: e.g., Yu (1909) called them big and small subject, Yoon (2003, 2007) major and grammatical subject, and Lee (2007) subject [Spec, RefP] and subject [Spec, TP], respectively. The ...