$先锋天然气(VNR)$ 8-K - Current report Filed: 2019-02-01 AccNo: 0001384072-19-000006 Size: 36 KBItem 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain OfficersItem 5.07: Submission of Matters to a Vote of Security Holders 网页链接