Teacher:This task involves annotating the answer type to a given question that involve some kind of complex reasoning (including numerical reasoning). Note that the questions require looking at more than one part of the passage to answer. There are 3 possible answer types (i) spans, (ii) numbers and (iii) dates. If the answer can be found in the passage, label it as "span". If the answer is a number, label as "number". Similarly, label "date" if you think the answer to the given question is a date.
Teacher: Now, understand the problem? Solve this instance: Passage: With almost 80% of the total land area suitable for crop production and about 17% of the labor force engaged in farming, agriculture remains the primary occupation, accounting for 11% of GDP in 2001. Value of agricultural output grew at an average annual rate of 7.1% during 196873, but since 1975 the sector has been hampered by droughts (1975, 1977, and 1979), hurricanes (in 1979 and 1980), and slumping world prices and quota allocations for sugar (since 1985). In 1999, agricultural production was 0.4% higher than during 198991. The fertile Cibao Valley is the main agricultural center. In 1998, arable land totaled ; with land under permanent crops at .
Question: Which year had both a drought and a hurricane?
Student:
date