Question: when did south sudan join east african community
[{'answer': 'April 2016', 'provenance': [{'wikipedia_id': '1243041', 'title': 'East African Community', 'start_paragraph_id': 15, 'start_character': 114, 'end_paragraph_id': 15, 'end_character': 124, 'bleu_score': 1.0, 'section': 'Section::::History.:South Sudan accession.\n'}]}, {'answer': '2016'}, {'provenance': [{'wikipedia_id': '1243041', 'title': 'East African Community', 'start_paragraph_id': 15, 'start_character': 0, 'end_paragraph_id': 15, 'end_character': 318, 'bleu_score': 0.9657992495762461, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13221924716603036942}, 'section': 'Section::::History.:South Sudan accession.\n'}]}, {'provenance': [{'wikipedia_id': '32350676', 'title': 'South Sudan', 'section': 'Section::::Economy.:East African Community.\n', 'start_paragraph_id': 182, 'end_paragraph_id': 182, 'meta': {'evidence_span': ["South Sudan's Minister of Foreign Affairs, Barnaba Marial Benjamin, claimed publicly in October 2015 that, following evaluations and meetings of a special technical committee in May, June, August, September and October, the committee has recommended that South Sudan be allowed to join the East African Community. Those recommendations, however, had not been officially released to the public. It was reported that South Sudan could be admitted as early as November 2015 when the heads of East African States had their summit meeting. South Sudan was eventually approved for membership in East African Community in March 2016, and formally acceded with the signature of the treaty in April 2016. South Sudan has applied to join the Commonwealth of Nations, considering that South Sudan was part of the Anglo-Egyptian Sudan, and has 2 Commonwealth republics, Kenya and Uganda as neighbouring countries. South Sudan has of single-track gauge railway line from the Sudanese border", 'South Sudan was eventually approved for membership in East African Community in March 2016, and formally acceded with the signature of the treaty in April 2016.', 'It was reported that South Sudan could be admitted as early as November 2015 when the heads of East African States had their summit meeting. South Sudan was eventually approved for membership in East African Community in March 2016, and formally acceded with the signature of the treaty in April 2016.']}}]}]