Find the first occurance and if not found print the first line

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QURY: Contig103
SIZE: 264
...
STID: predicted protein [Physcomitrel...   
SCOR: 34 
EVAL: 2e-004

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QURY: Heritiera_allseq.fna.Contig1032
SIZE: 217
...
STID: unnamed protein product [Vitis vini... 
SCOR: 59   
EVAL: 6e-015

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#!/usr/bin/perl   
# the infile "query.txt" has multiple blast hits per each query
...
close NP;

</readmore>

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Query= Contig103
         (264 letters)
...

  Database: All non-redundant GenBank CDS
  translations+PDB+SwissProt+PIR+PRF excluding environmental samples

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