[lemma=the] [tag=□] □ □ □
[lemma=the] [tag=NN] □ □ □
[lemma=the] [tag=NNS] □ □ □
My first task was to wash the petri dishes that had been accumulated by Harrar 's graduate students ( Martland , McKelvey , and Showalter ) . As we round a bend in the river , we see the first evidence of the park invasions that have bedeviled preservationists . And it recognizes the importance of clearing the land mines that have maimed and killed indiscriminately and represent a major obstacle to the safe return of the 350,000 refugees along the Thai-Cambodian border .