document: {"document":{"title":"na","text":"Paid subscribers to AAAS publications including Science , Science NOW, Science Signaling , and Science Translational Medicine may also opt in for third-party informational e-mails or opt out of all e-mail communication (with the exception of subscription renewal information) by contacting AAAS Member Services. ","paragraphs":null,"sentences":null,"language":null},"classifications":[{"level":"document-Union","labels":["User Choice/Control"],"label_definitions":null}]}