Findings:

• Parentage
• questionable
• questionable virtue
• Self-referential nostalgia of questionable historical value
• Clear Channel's list of questionable songs
• Questionable Content
• Questionable (user)
• Questionable Reputatable Persons (category)
• The questionable snacks on Flight 314
• Questionable cause

If you Log in you could create a "questionable parentage" node. If you don't already have an account, you can register here.