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    at va.program_ (https://ssl.gstatic.com/colaboratory-static/common/c2e3d6947e85eb6d757b5a34be9eada1/external_binary.js:2421:442)
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    at va.next_ (https://ssl.gstatic.com/colaboratory-static/common/c2e3d6947e85eb6d757b5a34be9eada1/external_binary.js:14:195)
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    at b (https://ssl.gstatic.com/colaboratory-static/common/c2e3d6947e85eb6d757b5a34be9eada1/external_binary.js:17:309)
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