Question: when did starbucks become a publicly traded company
[{'answer': 'June 1992', 'provenance': [{'wikipedia_id': '178771', 'title': 'Starbucks', 'start_paragraph_id': 13, 'start_character': 72, 'end_paragraph_id': 13, 'end_character': 81, 'bleu_score': 1.0, 'section': 'Section::::History.:Sale and expansion.\n'}]}, {'answer': '1992', 'provenance': [{'wikipedia_id': '178771', 'title': 'Starbucks', 'start_paragraph_id': 13, 'start_character': 77, 'end_paragraph_id': 13, 'end_character': 81, 'bleu_score': 1.0, 'section': 'Section::::History.:Sale and expansion.\n'}]}, {'provenance': [{'wikipedia_id': '178771', 'title': 'Starbucks', 'start_paragraph_id': 13, 'start_character': 0, 'end_paragraph_id': 13, 'end_character': 525, 'bleu_score': 0.979896933041101, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6773175917721562533}, 'section': 'Section::::History.:Sale and expansion.\n'}]}, {'provenance': [{'wikipedia_id': '3736102', 'title': 'Orin C. Smith', 'section': 'Section::::Biography.\n', 'start_paragraph_id': 3, 'end_paragraph_id': 3, 'meta': {'evidence_span': ['Orin C. Smith (June 26, 1942 March 1, 2018) was President and Chief Executive Officer of Starbucks Corporation from 2000 to 2005. He joined Starbucks as Vice President and Chief Financial Officer in 1990, becoming President and Chief Operating Officer in 1994, and a director of Starbucks in 1996. Prior to joining Starbucks, Smith spent much of his career in management consulting with Deloitte & Touche. Later he became the Chief Budget Officer for two Governors: Dixie Lee Ray and Booth Gardner, followed by service as CFO of two international transportation companies.', 'He joined Starbucks as Vice President and Chief Financial Officer in 1990, becoming President and Chief Operating Officer in 1994, and a director of Starbucks in 1996.', 'June 26, 1942 March 1, 2018) was President and Chief Executive Officer of Starbucks Corporation from 2000 to 2005. He joined Starbucks as Vice President and Chief Financial Officer in 1990, becoming Pre']}}]}, {'provenance': [{'wikipedia_id': '178771', 'title': 'Starbucks', 'section': 'Section::::History.:Sale and expansion.\n', 'start_paragraph_id': 13, 'end_paragraph_id': 13, 'meta': {'evidence_span': ["At the time of its initial public offering (IPO) on the stock market in June 1992, Starbucks had 140 outlets, with a revenue of US$73.5 million, up from US$1.3 million in 1987. The company's market value was US$271 million by this time. The 12% portion of the company that was sold raised around US$25 million for the company, which facilitated a doubling of the number of stores over the next two years. By September 1992, Starbucks' share price had risen by 70% to over 100 times the earnings per share of the previous year.", "The company's market value was US$271 million by this time. The 12% portion of the company that was sold raised around US$25 million for the company, which facilitated a doubling of the number of stores over the next two years. By September 1992, Starbucks' share price had risen by 70% to over 100 times the earnings per share of the previous year."]}}]}]