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The City of Los Angeles 's Hyperion Treatment Plant is presently using a chemical , ferrous chloride ( as do other sewage treatment facilities ) , to keep the sulfur compounds soluble in the liquid , thus minimizing the sulfur compounds in the produced gas . Clergy spouses ( as do clergy ) often experience a disturbing gap between what they envision for the community of faith and the reality they actually encounter . The temperature continues to rise without visible effect ( as do libraries in continuing to build digital resources and services ) however when the water boils the effects are visible to all . Hence , for the purpose of our discussion , we can consider XML to be the standard representation of a wide variety of data sources ( as do others [ 28 ] ) . LSR can match the label space to be advertised by the peer ( as deter - mined from the LDP Identifier in the PDU header for the Initializa - tion message ) with a Hello adjacency previously created when Hellos were exchanged .