What is the name for the type of intermediate X formed in the reaction sequence below? 
Definitions:
Nonresponse Bias
A form of bias in survey data resulting from the difference between those who respond to the survey and those who do not, potentially skewing the results.
Sentiment Analysis
The computational process of identifying and categorizing opinions expressed in a piece of text to understand the writer's attitude.
Word-Phrase Dictionary
A reference source in print or digital format containing words and their meanings, phrases, or idioms.
Opinion Mining
The use of natural language processing, text analysis, and computational linguistics to identify, extract, and study subjective information and sentiments from text data.
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