Jelena de Belder-Kovačič
Jelena de Belder-Kovačič ( 23 August 1925 – 31 August 2003 ) was a Slovenian-Belgian botanist and horticulturist , who worked extensively on the taxonomy and preservation of plant specimens , gaining an international reputation for her development of the Kalmthout and Hemelrijk Arboreta . 
<triplet> Jelena de Belder-Kovačič <subj> 23 August 1925 <obj> date of birth <subj> 31 August 2003 <obj> date of death <triplet> Kalmthout <subj> Arboreta <obj> instance of