Task: Question Answering
Input (English): Passage: Seoba Srba (English: Migration of the Serbs) is a set of four similar oil paintings by the Serbian artist Paja Jovanović that depict Serbs, led by Archbishop Arsenije III, fleeing Old Serbia during the Great Serb Migration of 1690–91. The first was commissioned in 1895 by Georgije Branković, the Patriarch of Karlovci, to be displayed at the following year's Budapest Millennium Exhibition. In the view of the Serbian clergy, it would serve to legitimize Serb claims to religious autonomy and partial self-administration in Austria-Hungary by upholding the contention that Serbs left their homeland at the behest of the Holy Roman Emperor to protect the Habsburg Monarchy's borders.
Measuring 380 by 580 centimetres (150 by 230 in), the first painting was completed in 1896, and presented to Patriarch Georgije later that year. Dissatisfied, the Patriarch asked Jovanović to adjust his work to conform with the Church's view of the migration. Though Jovanović made the changes relatively quickly, he could not render them in time for the painting to be displayed in Budapest, and it therefore had to be unveiled at the Archbishop's palace in Sremski Karlovci. Jovanović went on to complete a total of four versions of the painting, three of which survive. The first version is on display at the patriarchate building of the Serbian Orthodox Church in Belgrade, the second at the Pančevo Museum, and the fourth at Princess Ljubica's Residence, in Belgrade. Migration of the Serbs holds iconic status in Serbian popular culture, and several authors repute it to be one of Jovanović's finest achievements. 
Question: What is the full name of the person who could not render the changes in time for the painting to be displayed in Budapest?
Output (English): Paja Jovanović.