# 40

> original song written, composed, and performed by U2

**Wikidata**: [Q2313537](https://www.wikidata.org/wiki/Q2313537)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/40_(song))  
**Source**: https://4ort.xyz/entity/40-q2313537


## References

1. ISWC Network
2. MusicBrainz
3. Freebase Data Dumps. 2013
4. SecondHandSongs