Our analysts have initiated coverage on the coal industry with focus on the following companies: Vale S.A. ( VALE ), Peabody Energy Corporation ( BTU ), Teck Resources Limited ( TCK ), Arch Coal Inc. ( ACI ), and Rio Tinto PLC ( RIO ).
In the context of the input sentence, determine the relationship between 'Teck Resources' and 'Corporation'.
Options: headquarters location, chairperson, platform, legal form