undefined method `each' for nil

PMC:3317373 / 10119-10123 JSONTXT

Annnotations TAB JSON ListView MergeView

    pmc-enju-pas

    {"project":"pmc-enju-pas","denotations":[{"id":"T4208","span":{"begin":0,"end":4},"obj":"VB"}],"namespaces":[{"prefix":"_base","uri":"http://kmcs.nii.ac.jp/enju/"}],"text":"were"}