Detailed Instructions: In this task, you are given a context paragraph of the tweet and question. Your task is to generate right answer of given question based on given context tweet paragraph.
Q: Context: Green Line: Service may be impacted Tuesday AM. Trains every 8-10 min with POSSIBLE shuttle bus replacement btwn Navy Yard & Gallery Place. Metrorail Info (@Metrorailinfo) January 13, 2015 Question: when will service be impacted
A:
tuesday