Please answer the following question: Facts: - formercoach: knut schubert julia gnilozubova - formertraininglocations: dortmund - caption: mari at the 2011 german championships vartmann and aaron van cleave during the exhibitions - height: 1.54 - currenttraininglocations: berlin - formerpartner: florian just - country: germany - beganskating: 1993 - birth date: 25 december 1988 - partner: '' ' aaron van cleave '' ' - name: mari vartmann - coach: maylin wende daniel wende - choreographer: paul boll mark pillay - image: mari-dorisvartmannaaronvancleave dm2011.jpg Based on these bullet points, write a short biography describing the life of mari vartmann .
Answer:
mari-doris vartmann -lrb- born 25 december 1988 in neuss , west germany -rrb- is a german pair skater .with partner aaron van cleave , she is the 2015 german national champion , the 2011 nrw trophy champion , and 2010 warsaw cup champion .with former partner florian just , she is a three-time german national medalist .