Triple

Given a phrase, classify it is english named entity (e.g., persons, organizations, works of art) in Latin script, or not (e.g., literals, dates, URLs, verbose phrases). For disambiguation, the statement where the phrase occurs as object is also given. Please return a JSON object with `phrase` (string, the phrase being analyzed) and `is_ne` (boolean, indicating whether the phrase is a Named Entity).

Phrase: San Joaquin River headwaters | Statement: [John Muir Wilderness, containsFeature, San Joaquin River headwaters]

Target entity: San Joaquin River headwaters
Context triple: [John Muir Wilderness, containsFeature, San Joaquin River headwaters]

• A. Kaweah River headwaters
  The Kaweah River headwaters are the high-elevation source streams of the Kaweah River in the southern Sierra Nevada of California, originating in rugged alpine terrain within and around Sequoia National Park.
• B. Tuolumne River
  The Tuolumne River is a major Sierra Nevada waterway in California known for its scenic alpine meadows, deep granite canyons, and popular whitewater rafting and fishing opportunities.
• C. Merced River
  The Merced River is a major Sierra Nevada waterway in California renowned for carving Yosemite Valley and providing iconic scenic, recreational, and ecological value within and beyond Yosemite National Park.
• D. San Joaquin River chosen
  The San Joaquin River is a major river in central California that flows through the San Joaquin Valley and supports extensive agricultural, ecological, and water supply systems before joining the Sacramento–San Joaquin Delta.
• E. South Fork American River
  The South Fork American River is a major tributary of California’s American River in the Sierra Nevada foothills, renowned for its historical role in the Gold Rush and its popular whitewater rafting runs.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.