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: Greek-Kazakh relations are the relations between Greece and Kazakhstan. Both countries established diplomatic relations on October 1, 1992. Greece opened an embassy in Almaty in February, 1997. Kazakhstan opened an embassy in Athens in 2005. Kazakhstan has had an honorary consulate in Athens since 1998. Kazakhstan has a Greek community of 10,000 to 12,000 people. The Greek community is a valued ethnic group in Kazakhstan multi-ethnic society. Kazakhstan's diplomats regularly brief Greek officials of the Greek community in Kazakhstan. Along with communities based in nearby Kyrgyzstan, the expatriate Greeks are served by a "Friendship federation", which publishes a small newspaper and organises social events.
Question: How many years passed between the opening of the Greek embassy in Kazakhstan and the opening of the Kazakhstan embassy in Athens?
Student:
number