Athletics' governing body, the IAAF, last week cleared Ottey of accusations of steroid use and lifted a two-year ban after their arbitration panel said the IOC-accredited lab in Lausanne improperly tested Ottey's urine sample.
blame is not assigned in the passage
it is clearly stated that in fact the testing agency is to blame for a faulty result
( z1 assign :polarity - :ARG1 ( z2 blame ) :location ( z3 passage ) )