The student did not clearly state an appropriate and specific question for the historical investigation, as the phrase used is too broad and lacks clarity. The question also lacks a defined scope regarding dates and significant events related to the Karabakh conflict. While the student chose appropriate and relevant sources for the topic and explained their relevance effectively, there was a failure to indicate whether the sources were primary or secondary. Additionally, the analysis of the values and limitations of the sources needs improvement, particularly in detailing the limitations related to the sources' origins and content.