For the question with the Groundskeeper as a speaker. Why is the second sentence Premise and not Context? It is a premise if we assume "concerts as well as sixty matches a year" is a negative feature. However, we do not know if it is negative. We do not know if concerts + 60 matches is a lot or a little. It seems more like Context as it just reports the events held.

For Q2, isn't the first part of the last sentence a premise? And the remaining portion is the conclusion.