What are the most expensive cities in the world ?
This is an exhaustive list of the most expensive cities : Singapore, Tel Aviv,  New York, Hong Kong, Los Angeles,  Zurich, Geneva, San Francisco, Paris and Sydney
<START_INST>What are the most expensive cities in the world ?<END_INST><START_CTX><END_CTX><START_A>This is an exhaustive list of the most expensive cities : Singapore, Tel Aviv,  New York, Hong Kong, Los Angeles,  Zurich, Geneva, San Francisco, Paris and Sydney<END_A>