\q1 \v=8 \v~=\w Who|x-occurrence="1" x-occurrences="2"\w* \w has|x-occurrence="1" x-occurrences="2"\w* \w heard|x-occurrence="1" x-occurrences="1"\w* \w of|x-occurrence="1" x-occurrences="1"\w* \w such|x-occurrence="1" x-occurrences="2"\w* \w a|x-occurrence="1" x-occurrences="3"\w* \w thing|x-occurrence="1" x-occurrences="1"\w*? \w Who|x-occurrence="2" x-occurrences="2"\w* \w has|x-occurrence="2" x-occurrences="2"\w* \w seen|x-occurrence="1" x-occurrences="1"\w* \w such|x-occurrence="2" x-occurrences="2"\w* \w things|x-occurrence="1" x-occurrences="1"\w*? \¬q1 \q1 \p~<