Read the following premise and answer if the hypothesis is true.
The following bibliography of Roberto Bolaño provides a chronological list of the published works of Chilean writer Roberto Bolaño (1953–2003). It includes his fiction (novels, short stories, poems) and non-fiction (essays, speeches, interviews), both published during his lifetime and posthumously.
Hypothesis: Roberto Bolaño wrote most of his works in the 80's. Is the answer "Yes", "No", or "It's impossible to say"? Respond with only the answer and no additional text.
It's impossible to say
It's impossible to say based on the provided information.