You will be shown an abstract from a biomedical research paper. Given this abstract, your task is to extract all unique entities of the following types: ["Chemical"].

Please return the output as a JSON object of the format: {"Chemical": ["Arsenic", ...]}. The keys should be entity types and values should be lists of extracted entities belonging to the corresponding type. If you cannot find entities belonging to a specific type, the value should be [].

Only output the JSON object and do not include any additional text.

Abstract:

Straight talk with...Miyoung Chun. It was a single tweet. In February, after US President Barack Obama made a subtle nod to a new neuroscience project in his annual State of the Union address, Francis Collins, director of the country's National Institutes of Health (NIH), posted on the @NIHDirector Twitter feed: "Obama mentions the #NIH Brain Activity Map in #SOTU." Instantly, scientists were buzzing with rumors that the Brain Activity Map could be the next moon shot, with a budget and timeline similar to the Human Genome Project. The brain map began as a brief white paper and has grown into a large-and still largely undefined-collaboration of several government agencies, nonprofit foundations and private companies. As the stakeholders describe in a commentary published last month ( 339, 1284-1285, 2013 10.1126/science.1236939), the goal of the initiative is to understand how thousands of neurons work in concert to control behavior and trigger disease. Miyoung Chun, vice president for science programs at The Kavli Foundation in Oxnard, California, has been developing the project since the beginning and is the self-described "glue" between its many diverse stakeholders. Chun spoke with Virginia Hughes about the evolution of the project and what it might mean for biomedicine.
{"Chemical": []}