Validate that no single EP political group dominates the article's coverage.
Single-group dominance (one group with > 60% of all group mentions) may indicate
bias or unbalanced perspective coverage.
Parameters
html: string
Complete article HTML
Returns string|null
Warning message if one group dominates, or null if balanced
Validate that no single EP political group dominates the article's coverage. Single-group dominance (one group with > 60% of all group mentions) may indicate bias or unbalanced perspective coverage.