IN: The Channel Tunnel (French: Le tunnel sous la Manche; also nicknamed the Chunnel) is a 50.45-kilometre (31.35 mi) rail tunnel linking Folkestone, Kent, in the United Kingdom, with Coquelles, Pas-de-Calais, near Calais in northern France, beneath the English Channel at the Strait of Dover. At its lowest point, it is 75 m (250 ft) deep below the sea bed and 115 m (380 ft) below sea level. At 37.9 kilometres (23.5 mi), the tunnel has the longest undersea portion of any tunnel in the world, although the Seikan Tunnel in Japan is both longer overall at 53.85 kilometres (33.46 mi) and deeper at 240 metres (790 ft) below sea level. The speed limit for trains in the tunnel is 160 kilometres per hour (99 mph).
is there a tunnel from england to europe?

OPTIONS:
- no
- yes

OUT: yes

IN: The EF of the left heart, known as the left ventricular ejection fraction (LVEF), is calculated by dividing the volume of blood pumped from the left ventricle per beat (stroke volume) by the volume of blood collected in the left ventricle at the end of diastolic filling (end-diastolic volume). LVEF is an indicator of the effectiveness of pumping into the systemic circulation. The EF of the right heart, or right ventricular ejection fraction (RVEF), is a measure of the efficiency of pumping into the pulmonary circulation. A heart which cannot pump sufficient blood to meet the body's requirements (i.e., heart failure) will often, but not invariably, have a reduced ventricular ejection fraction.
is ejection fraction the same as stroke volume?

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- no
- yes

OUT: no

IN: The pathogenesis of RLP is varied. Although very common during pregnancy, non-gestating women can also experience RLP. The most common causes of RLP are as follows:
can you get round ligament pain not pregnant?

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- no
- yes

OUT: yes

IN: Death from laughter is a rare form of death, usually resulting from cardiac arrest or asphyxiation, caused by a fit of laughter. Instances of death by laughter have been recorded from the times of ancient Greece to the modern day.
can you have a heart attack from laughing?

OPTIONS:
- no
- yes

OUT:
yes