Given a text extract any grant funding information for the paper.
Text:
"""this project, and for comments on several drafts. We are grateful to the Center for AI Safety for
generously providing computational resources needed to run many of the experiments in this paper.
This work was supported by DARPA and the Air Force Research Laboratory under agreement
number FA8750-15-2-0277, the U.S. Army Research Office under MURI Grant W911NF-21-1-0317,
and the National Science Foundation under Grant No. CNS-1943016."""
Instructions:

1) Extract the funding agents and the funding IDs if exists.
2) For each funding ID match it with its funding agent.
3) return as output only a JSON list where each object will have as keys "agent" and the "funding_id" if exists.
4) if a grant agency is not related to a "funding_id" please assign the "funding_id" field as null. Your response should contain less than 550 words.
user