Question: Is the clearance of 15 kV, 16.7 Hz AC railway electrification less than 4.4?
Paraphrase: Is the clearance of 15 kV, 16.7 Hz AC railroad jolt less than 4.4?
SPARQL (Wikidata): ASK WHERE { wd:Q1415234 wdt:P2793 ?obj filter(?obj < 4.4) }