Brigitte Bierlein makes a statement in Vienna, Austria, June 3, 2019. Brigitte Bierlein, the 69-year-old former head of Austria's top court, has officially taken office as the first female chancellor for the country. (Xinhua/Guo Chen)

Brigitte Bierlein makes a statement in Vienna, Austria, June 3, 2019. Brigitte Bierlein, the 69-year-old former head of Austria's top court, has officially taken office as the first female chancellor for the country. (Xinhua/Guo Chen)

Brigitte Bierlein makes a statement in Vienna, Austria, June 3, 2019. Brigitte Bierlein, the 69-year-old former head of Austria's top court, has officially taken office as the first female chancellor for the country. (Xinhua/Guo Chen)

Brigitte Bierlein makes a statement in Vienna, Austria, June 3, 2019. Brigitte Bierlein, the 69-year-old former head of Austria's top court, has officially taken office as the first female chancellor for the country. (Xinhua/Guo Chen)

Brigitte Bierlein makes a statement in Vienna, Austria, June 3, 2019. Brigitte Bierlein, the 69-year-old former head of Austria's top court, has officially taken office as the first female chancellor for the country. (Xinhua/Guo Chen)

Brigitte Bierlein makes a statement in Vienna, Austria, June 3, 2019. Brigitte Bierlein, the 69-year-old former head of Austria's top court, has officially taken office as the first female chancellor for the country. (Xinhua/Guo Chen)

Brigitte Bierlein makes a statement in Vienna, Austria, June 3, 2019. Brigitte Bierlein, the 69-year-old former head of Austria's top court, has officially taken office as the first female chancellor for the country. (Xinhua/Guo Chen)

Brigitte Bierlein makes a statement in Vienna, Austria, June 3, 2019. Brigitte Bierlein, the 69-year-old former head of Austria's top court, has officially taken office as the first female chancellor for the country. (Xinhua/Guo Chen)