How do you tell the Weather Underground, the militant organization, from Weather Underground, the weather service?

Did it try to break Timothy Leary out of jail? That's the militant organization.

Does it give more accurate hurricane predictions than Weather.com? That's the weather service.

Did it bomb the Pentagon? That's the militant organization.

Is it owned by IBM? That's the weather service.

Is it named after a Bob Dylan lyric? That's the militant organization.

Is it named after the militant organization? That's the weather service. (Wait? What!?)

Was it led by Bernardine Dohrn, a law professor at Northwestern University? That's the militant organization. (What?!?!?!)