(+) this machine / make strange noise, (-) my computer / not work properly, (?) why / Paul / not come to the meeting, (+) they / put the load on the sling, (-)  Farid / not work in the field today, (?) the pipes / arrive right now, (+) the crane / be repaired today, (-) (+) the geologist / not take samples / he / analyze data, (?)  Susan / phone the suppliers,

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