Fail to verify tarball

[Erik Apostol]

I try to verify the signature of the newly downloaded LyX tarball as the
instruction on the LyX website:
gpg --recv-keys FE66471B43559707AFDAD955DE7A44FAC7FB382D
Unfortunately, gpg replies
gpg: no keyserver known (use option --keyserver)
gpg: keyserver receive failed: bad URI
Do I really need to add a keyserver? So what is the address of the
keyserver?
Erik