Find the the relationship (provide only the relationship number) between the entities carthay circle publishing and wowioinc from the following text.
The different relations that can be present are:
0: no_relation
6: org:org:acquired_by
15: org:org:subsidiary_of
16: org:org:shares_of
20: org:org:agreement_with

Wowio , Inc. and its wholly owned subsidiary Carthay Circle Publishing ( collectively , Wowio , Inc , Wowio , Inc , Wowio , Inc , Wowio ) is an emerging company in the creation , production , distribution and monetization of digital entertainment .

Provide your response as one single number