2019 was designated as International Year of the Periodic Table of Chemical Elements by the United Nations General Assembly given that it coincides with the 150th anniversary of its creation by Dmitri Mendeleev in 1869 .
NUM AUX VERB ADP PROPN PROPN ADP DET PROPN PROPN ADP PROPN PROPN ADP DET PROPN PROPN PROPN PROPN VERB SCONJ PRON VERB ADP DET ADJ NOUN ADP PRON NOUN ADP PROPN PROPN ADP NUM .