In this task, you're given a passage that represents a legal contract or clause between multiple parties, followed by a question that needs to be answered. Based on the paragraph, you must write unambiguous answers to the questions and your answer must refer a specific phrase from the paragraph. If multiple answers seem to exist, write the answer that is the most plausible.
Q: EXHIBIT A JOINT FILING AGREEMENT In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, the undersigned agree to the joint filing on behalf of each of them of a statement on Schedule 13G (including amendments thereto) with respect to the Common Stock of Spring Bank Pharmaceuticals, Inc. and further agree that this agreement be included as an exhibit to such filing. Each party to the agreement expressly authorizes each other party to file on its behalf any and all amendments to such statement. Each party to this agreement agrees that this joint filing agreement may be signed in counterparts. In evidence whereof, the undersigned have caused this Agreement to be executed on their behalf this 7t h day of April, 2020. UBS ONCOLOGY IMPACT FUND L.P. ONCOLOGY IMPACT FUND (CAYMAN) MANAGEMENT L.P. By: Oncology Impact Fund (Cayman) Management L.P, By: MPM Oncology Impact Management LP, its General Partner its General Partner By: MPM Oncology Impact Management LP, By: MPM Oncology Impact Management GP LLC, its General Partner its General Partner By: MPM Oncology Impact Management GP LLC, By: /s/ Ansbert Gadicke its General Partner Name: Ansbert Gadicke Title: Managing Member By: /s/ Ansbert Gadicke Name: Ansbert Gadicke Title: Managing Member MPM ONCOLOGY IMPACT MANAGEMENT LP MPM ONCOLOGY IMPACT MANAGEMENT GP LLC By: MPM Oncology Impact Management GP LLC, By: /s/ Ansbert Gadicke its General Partner Name: Ansbert Gadicke Title: Managing Member By: /s/ Ansbert Gadicke Name: Ansbert Gadicke Title: Managing Member 
Question: Highlight the parts (if any) of this contract related to Agreement Date that should be reviewed by a lawyer. Details: The date of the contract
A:
7t h day of April, 2020.