instruction:
In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
question:
A head teacher ( also called a school principal , or headmaster / headmistress ) is the teacher in charge of a school .
answer:
A head teacher , headmaster , headmistress , head , chancellor , principal or school director ( sometimes another title is used ) is the staff member of a school with the greatest responsibility for the management of the school .

question:
" Burning " ( calcination ) converts them into the highly caustic material " quicklime " ( calcium oxide ) , and , through the addition of water , into the less caustic , but still strongly alkaline " slaked lime " ( calcium hydroxide ) .
answer:
" Burning " ( calcination ) of these minerals in a lime kiln converts them into the highly caustic material " burnt lime " , " unslaked lime " or " quicklime " ( calcium oxide ) and , through subsequent addition of water , into the less caustic ( but still strongly alkaline ) " slaked lime " or " hydrated lime " ( calcium hydroxide , Ca ( OH ) ) , the process of which is called " slaking of lime " .

question:
Krupa also studied Art History ( non-degree research ) at the University of Zagreb ( 1997,1998 ) and in 1998/99 as the postgraduate research student at the Tokyo Gakugei University ( ) or Gakudai ( ) .
answer:
Krupa also studied Art History ( non-degree research ) at the University of Zagreb ( 1997,1998 ) and in 1998/99 as the postgraduate research student ( The Monbukagakusho Scholarship ( , Monbukagakusho Sho gakukin ) ) at the Tokyo Gakugei University ( ) or Gakudai ( ) .