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Fig. 2

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Upper panel: normalized, continuum-subtracted molecular and ionized gas line profiles for 4C 12.50. In addition to the profiles of the MIR lines, the 5007 Å [O iii] profile that is convolved to the resolution of IRS is presented for comparison. The blue wing is detected in all lines except for the unresolved S3. Lower panel: H2 excitation diagram constructed separately for the primary Gaussian component (open diamonds) and the secondary Gaussian component (stars) of each H2 line.

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