Worker 2 [groaning]: "It's ... it's in the ul2 subfolder. You only need
   the ul2 subfolder."
   Zombie with Pink Skin [grabs somebody else's brain and munches a
   little]: "git clone --no-checkout --filter=blob:none
   [1]https://github.com/google-research/google-research; cd
   google-research; git checkout master -- ul2"
    Zombie with Pink Skin stares wide-eyed.
   Zombie with Pink Skin: "What did I just say?"

References

   1. https://github.com/google-research/google-research