Please answer the following question: What key details about shvarn can be extracted from the following bio? Bio: shvarn or shvarno daniilovich -lrb- , ; c. 1230 -- c. 1269 -rrb- , was the knyaz of western parts of galicia -lrb- 1264 -- c. 1269 -rrb- and grand duke of lithuania -lrb- 1267 -- c. 1269 -rrb- . an influential leader , he became involved in internal struggles of power within neighboring grand duchy of lithuania . he also held the town of kholm -lrb- modern chem , poland -rrb- in his domain .
A:
- death place is kholm -lrb- modern chem , poland -rrb-- succession is grand duke of lithuania- reign is 1267 -- 1269- successor is traidenis- spouse is nn mindaugas -rrb- -lrb- sister of vaisvilkas , daughter of king- predecessor is vaisvilkas- mother is anna the bold -rrb- mstislavna of novgorod -lrb- daughter of mstislav mstislavich- death date is c. 1269- house is rurik- father is daniel of galicia- birth date is c. 1230- name is '' ' shvarn daniilovich '' '- image is mindaugas -lrb- 1835 -rrb- . jpg- birth place is halych -lrb- now ukraine -rrb-