Question: when does the next warrior book come out
[{'answer': 'April 10 , 2018', 'provenance': [{'wikipedia_id': '1886892', 'title': 'Warriors (novel series)', 'start_paragraph_id': 31, 'start_character': 942, 'end_paragraph_id': 31, 'end_character': 957, 'bleu_score': 1.0, 'section': 'Section::::Series.:"Warriors: A Vision of Shadows".\n'}]}, {'provenance': [{'wikipedia_id': '1886892', 'title': 'Warriors (novel series)', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1320424470129798658}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1886892', 'title': 'Warriors (novel series)', 'section': 'Section::::Series.:"Warriors: A Vision of Shadows".\n', 'start_paragraph_id': 31, 'end_paragraph_id': 31, 'meta': {'evidence_span': ['"Warriors: A Vision of Shadows" is the sixth sub-series. The series was originally titled, "Warriors: StarClan\'s Promise". The first book, "The Apprentice\'s Quest", which takes place approximately eight months after "Bramblestar\'s Storm," was released on 15 March 2016. The books\' main characters are Sparkpaw/Sparkpelt and Alderpaw/Alderheart who are Bramblestar\'s and Squirrelflight\'s children. Later on, Twigkit/Twigpaw/Twigbranch and Violetkit/Violetpaw/Violetshine, who are later discovered to be lost SkyClan kits/appentices/warriors, also become main characters. The first book, "The Apprentice\'s Quest," starts with each Clan\'s medicine cats receiving a prophecy from StarClan together, telling them to ""Embrace what you find in the shadows, for only they can clear the sky"". The following books are "Thunder and Shadow (September 6, 2016)", "Shattered Sky" "(April 11, 2017)", "Darkest Night (November 7, 2017)", "River of Fire" "(April 10, 2018)" and "The Raging Storm" "(November 6, 2018)".', 'The first book, "The Apprentice\'s Quest," starts with each Clan\'s medicine cats receiving a prophecy from StarClan together, telling them to ""Embrace what you find in the shadows, for only they can clear the sky"". The following books are "Thunder and Shadow (September 6, 2016)", "Shattered Sky" "(April 11, 2017)", "Darkest Night (November 7, 2017)", "River of Fire" "(April 10, 2018)', '"Warriors: A Vision of Shadows" is the sixth sub-series. The series was originally titled, "Warriors: StarClan\'s Promise". The first book, "The Apprentice\'s Quest", which takes place approximately eight months after "Bramblestar\'s Storm," was released on 15 March 2016. The books\' main characters are Sparkpaw/Sparkpelt and Alderpaw/Alderheart who are Bramblestar\'s and Squirrelflight\'s children. Later on, Twigkit/Twigpaw/Twigbranch and Violetkit/Violetpaw/Violetshine, who are later discovered to be lost SkyClan kits/appentices/warriors, also become main characters. The first book, "The Apprentice\'s Quest," starts with each Clan\'s medicine cats receiving a prophecy from StarClan together, telling them to ""Embrace what you find in the shadows, for only they can clear the sky"". The following books are "Thunder and Shadow (September 6, 2016)", "Shattered Sky" "(April 11, 2017)", "Darkest Night (November 7, 2017)", "River of Fire" "(April 10, 2018)" and "The Raging Storm" "(November 6, 2018)".']}}]}]