Talk 21 via live stream

          @misc{ scivideos_PIRSA:19070043,
            doi = {10.48660/19070043},
            url = {https://pirsa.org/19070043},
            author = {Landry, Walter and Simmons-Duffin, David},
            keywords = {Quantum Fields and Strings},
            language = {en},
            title = {Talk 21 via live stream },
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2019},
            month = {jul},
            note = {PIRSA:19070043 see, \url{https://scivideos.org/pirsa/19070043}}
          }