Tozawa, and two anonymous EL reviewers for their helpful comments and suggestions. A part of this paper was read at the conference 'Pronouns: Syntax, Semantics, Processing' at Higher School of Economics in Moscow on 19 June 2015. I am grateful to Philippe Bourdin, Barbara Partee, and Eric Reuland for their invaluable comments and encouragement. My special thanks also go to Tomoko Haraguchi for discussion at every stage up to the completion of the present version. All remaining errors and inadequacies are my own. This is supported in part by a grant from Nagoya Gakuin University 2015.