Given the task definition and input, reply with output. In this task, you are given a context tweet and an answer. Your job is to generate a question for the given answer based on the given tweet paragraph. Note that your question should be answerable based on the given tweet, and the answer to your question should be the given answer.

Context: Estonia is of 5 NATO allies in Europe to meet its 2% def expenditures commitment. Fought, with no caveats, in NATO's sole Art. 5 op. in Afg.— toomas hendrik ilves (@IlvesToomas) July 21, 2016 Answer: 2% def expenditures

what commitment did estonia meet?