Definition: Given a document, generate a short title of the document. The title should convey the main idea/event/topic about which the document is being written. Note that URLs in the text have been replaced with [Link].
Input: Bill Gates  and Richard Branson have some big goals.
Branson wants to go to space and send hyperloop pods shooting through underground tunnels at the speed of airplanes.  Gates  wants to rid the world of Polio and Alzheimer's disease  as well as implement the Bill & Melinda Gates Foundation's extensive list of other moonshots. Both the Microsoft founder and Virgin Group founder backed a start-up that grows meat in a lab and hopes to reduce the environmental impact of raising livestock.
And while some challenges seem insurmountable â even for a pair of the world's most powerful people â Branson and  Gates  agree it's crucial to chase big ideas  even if success isn't immediate.
" Bill  and I spoke about the importance backing long-shot projects " Branson writes on his blog about a meeting the billionaires had Tuesday. The two met in Paris for a summit focused on one such challenge  climate change.
"I've learned so much from  Bill .  He  built a formidable company and decided to put  his  vast wealth into solving the problems of the world " Branson writes.
For Branson himself  dreaming big has also been key to  his  success.

Bill Gates  Richard Branson: Why it is important to have big goals