ensure sufficient material for the performing of cleaning duties are collected from the stores .
B-SKILL I-SKILL I-SKILL I-SKILL I-SKILL I-SKILL I-SKILL I-SKILL I-SKILL I-SKILL I-SKILL I-SKILL I-SKILL I-SKILL O
VB JJ NN IN DT NN IN NN NNS VBP VBN IN DT NNS .