Analyze the relationship between 'Number' and 'steam' within the context of the input sentence.
Options: product/material produced, chief executive officer, industry, distributed by

Number three, we have higher cost than the typical oil resource play because we are about – we are weighted 88% oil, and we use energy in the form of steam to produce the majority of our oil and don’t have a large barrel of oil equivalent from gas production, masking our oil production cost.
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