<slide>
<title>Aggregation example</title>

<example>
…
{
	"_id" : "n1996641853",
	"tags" : [
		"amenity=restaurant",
		"cuisine=japanese",
		"name=Kaiseki"
	]
}
{
	"_id" : "n1618702957",
	"tags" : [
		"amenity=fast_food",
		"cuisine=kebab",
		"name=Pita Durum"
	]
}
…
</example>
<blurb>We want all different cuisines, with their usage count</blurb>
</slide>
