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Group 5, Puzzle 1

0001_0002__happened happened 0001_0001__It it 0001_0002__happened->0001_0001__It [arg0] 0001_0003__when when[tmp] 0001_0003__when->0001_0002__happened [scope] 0001_0005__were were 0001_0003__when->0001_0005__were [restriction] 0001_0004__we we 0001_0005__were->0001_0004__we [arg0] 0001_0007__Switzerland switzerland 0001_0005__were->0001_0007__Switzerland in[clr][prd2]