Pool testing allows scientists to test samples more efficiently, analyzing many samples at once. To test samples more efficiently, the researchers used a technique called 'pooling.' That is essentially most of America's workforce. Samples came from six major metropolitan areas: San Francisco, Boston, Minneapolis, Los Angeles, New York City, and Seattle. If a pool tests positive, scientists then re-test smaller groups of samples included in the pool in order to find the positive one.
In order to assure a better test of the samples they studied, the  pool testers used a counter technique called “pooled”  among others.
( z0 use :purpose ( z1 assure :ARG2 ( z2 test :ARG1 ( z3 thing :ARG1-of ( z4 sample ) :ARG1-of ( z5 study :ARG0 ( z6 person :ARG0-of ( z7 test :ARG1 ( z8 pool ) ) ) ) ) :ARG1-of ( z9 have-degree :ARG2 ( z10 good :ARG1 z2 ) :ARG3 ( z11 more ) ) ) ) :ARG0 z6 :ARG1 ( z12 technique :ARG0-of ( z13 counter ) :ARG1-of ( z14 call :ARG2 ( z15 pool ) :prep-among ( z16 other ) ) ) )
(z0 / use-01
    :purpose (z1 / assure-01
                 :ARG2 (z2 / test-01
                           :ARG1 (z3 / thing
                                     :ARG1-of (z4 / sample-01)
                                     :ARG1-of (z5 / study-01
                                                  :ARG0 (z6 / person
                                                            :ARG0-of (z7 / test-01
                                                                         :ARG1 (z8 / pool)))))
                           :ARG1-of (z9 / have-degree-91
                                        :ARG2 (z10 / good-02
                                                   :ARG1 z2)
                                        :ARG3 (z11 / more))))
    :ARG0 z6
    :ARG1 (z12 / technique
               :ARG0-of (z13 / counter-01)
               :ARG1-of (z14 / call-01
                             :ARG2 (z15 / pool-01)
                             :prep-among (z16 / other))))
In order to assure a better test of the samples they studied , the pool testers used a counter technique called " pooled” among others .
z9 :ARG2 z10
z9 :ARG3 z11
z10 :ARG1 z2
z2 :ARG1-of z9
z1 :ARG2 z2
z2 :ARG1 z3
z3 :ARG1-of z4
z3 :ARG1-of z5
z5 :ARG0 z6
z6 :ARG0-of z7
z7 :ARG1 z8
z0 :ARG0 z6
z0 :purpose z1
z12 :ARG0-of z13
z0 :ARG1 z12
z12 :ARG1-of z14
z14 :ARG2 z15
z14 :prep-among z16