text 151 1251 812 1981
text 851 981 1508 1610
abstract 206 606 752 1186
text 852 1763 1506 1830
text 851 1930 1506 1994
text 851 609 1506 827
equation 951 1636 1406 1723
equation 959 853 1397 940
equation 1015 1856 1341 1904
author 152 391 1477 528
title 228 244 1434 291