Problem: Composers of classical music have often made use of folk music (music created by musicians who are commonly not classically trained, often from a purely oral tradition). Some composers, like Dvořák and Smetana, have used folk themes to impart a nationalist flavor to their work, while others like Bartók have used specific themes lifted whole from their folk-music origins.
Who used specific themes lifted from folk-music?
The answer is the following: Bartók

Problem: While he searched for enlightenment, Gautama combined the yoga practice of his teacher Kalama with what later became known as "the immeasurables".[dubious – discuss] Gautama thus invented a new kind of human, one without egotism.[dubious – discuss] What Thich Nhat Hanh calls the "Four Immeasurable Minds" of love, compassion, joy, and equanimity[full citation needed] are also known as brahmaviharas, divine abodes, or simply as four immeasurables.[web 5] Pema Chödrön calls them the "four limitless ones". Of the four, mettā or loving-kindness meditation is perhaps the best known.[web 5] The Four Immeasurables are taught as a form of meditation that cultivates "wholesome attitudes towards all sentient beings."[web 6][web 7]
Gautama combined the yoga practice of what teacher?
The answer is the following: Kalama

Problem: Slavs are customarily divided along geographical lines into three major subgroups: West Slavs, East Slavs, and South Slavs, each with a different and a diverse background based on unique history, religion and culture of particular Slavic groups within them. Apart from prehistorical archaeological cultures, the subgroups have had notable cultural contact with non-Slavic Bronze- and Iron Age civilisations.
Who is customarily divided along geographical lines into tree major subgroups?
The answer is the following: Slavs

Problem: The traditional energy supply of Thuringia is lignite, mined in the bordering Leipzig region. Since 2000, the importance of environmentally unfriendly lignite combustion has declined in favour of renewable energies, which reached an amount of 40% (in 2013), and more clean gas combustion, often carried out as Cogeneration in the municipal power stations. The most important forms of renewable energies are Wind power and Biomass, followed by Solar energy and Hydroelectricity. Furthermore, Thuringia hosts two big pumped storage stations: the Goldisthal Pumped Storage Station and the Hohenwarte Dam.
Where does Thuringia get it's lignite?
The answer is the following:
mined in the bordering Leipzig region