You will be given a definition of a task first, then some input of the task.
In this task, you will be shown a passage. You need to write a fill-in-the-gap question based on your understanding of the events that might be inferred from the passage. Your question should be answerable based on the passage and only have one correct answer. Show the gap in your question with a _ .

One way or another, Chile's Copa America semi-final with Peru will be settled in Santiago on Monday night, but the two nations will continue to bicker long after the full-time whistle. Whether the debate centres on cocktails or overhead kicks, agreeing to disagree is the only thing these two rivals will concede to one another. And the clash - the most important in almost 20 years - will re-open old wounds in what is one of football's fiercest yet little-known rivalries. The animosity dates back to the four-year War of the Pacific at the end of the nineteenth century, hence its tag as the 'Pacific Clasico'. The 1879-1883 conflict, which also involved Bolivia, was fought over the supply of nitrates and ended with Chile annexing large parts of its neighbours' territory.Chile and Peru meet in the semi-finals of the Copa AmericaThe two nations have had animosity ever since the War of the PacificThey also disagree on where the local spirit Pisco originates fromChile are favourites for the clash after impressing during the tournament
Output:
Perhaps not, but don't expect the respective fans to come together for a glass of _ afterwards, either.