query(user string) -- make http request to duckduckgo api, to get result
	in json format, then call parse_result.

def query(string):
	"""query(user string) -- make http request to duckduckgo api, to get result
	in json format, then call parse_result.
	"""
	url = "https://api.duckduckgo.com/?q="
	formating = "&format=json"
	query_string = url+'+'.join(string)+formating
	try:
		result = json.loads(requests.get(query_string).text)
	except:
		print "I'm sorry! Something went wrong. Maybe we could try again later."
		return
	parse_result(result)