[tag=NN] [lemma=to] [tag=NN] [lemma=sample] [□]
[tag=NN] [lemma=to] [tag=NN] [lemma=sample] [□=□]
[tag=NN] [lemma=to] [tag=NN] [lemma=sample] [□ | □]
The next test used a sputter coater to coat samples with greater than a 5-nm-thick layer of gold .