You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "who is the richest ruler in the world?" whose answer is Ahmed bin Saeed Al Maktoum.
Each document should contain about 30 words, and these documents should contain useful information.

Query: richest ruler in the world
Useful Output:

Doc 1: The Saudi Royal Family are the richest because they use national wealth however they like. Similar to how Putin can be considered richest man on the planet.
Doc 2: Meet the 10 richest billionaire royals in the world right now · 10. Prince Albert II, Monaco · 9. Emir Sheikh Tamim bin Hamad Al Thani, Qatar.
Doc 3: The richest individual member of the $1.4 trillion (£1.1tn) Saudi Royal Family, King Salman bin Abdulaziz Al Saud is reported to be worth as
Doc 4: Subscribe for more! ▻ http://bit.ly/Subscribe-to-Richest ◅ Embark​ оn​ a regal journey with our latest video, "The Richest Royals​ In The
Doc 5: The Top 15 Wealthiest Royals · 1 King Bhumibol Adulyadej. Thailand Age: 80 $35 billion · 2 Sheikh Khalifa bin Zayed · 3 King Abdullah bin Abdul