a system where a same-subject reference tracking construction uses a different strategy from the standard discourse reference strategies found in connected discourse. This is essentially the use of zero anaphora in the same-subject reference tracking construction that is conditional on the construction rather than on the discourse context. Example: the coordination clause construction illustrated in Bilbo_i found a ring and Ø_i put it in his pocket uses zero anaphora in the second clause; zero anaphora is not generally allowed in discourse reference (*Put it in his pocket). (Section 16.2)