I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "As a result of the abolition of serfdom and the availability of education to the native Estonian-speaking population, an active Estonian nationalist movement developed in the 19th century.[citation needed] It began on a cultural level, resulting in the establishment of Estonian language literature, theatre and professional music and led on to the formation of the Estonian national identity and the Age of Awakening. Among the leaders of the movement were Johann Voldemar Jannsen, Jakob Hurt and Carl Robert Jakobson."? 

Jannsen, Hurt, and Jakobson all shared in the what culture?