1. A method comprising, by one or more computing systems: receiving, from a client system of a first user of an online social network, audio data of the first user; parsing the audio data to identify one or more commands in the audio data; determining, for each identified command, one or more types of social-graph elements corresponding to the respective identified command; and generating, responsive to the audio data, one or more social-graph elements in a social graph of the online social network, each generated social-graph element being one of the determined types.