Complex sentence: Bárðarbunga (pronounced (b'aurðarbuŋka)), Bardarbunga (Anglophone spelling), is an Icelandic subglacial stratovolcano located under the ice cap of Vatnajökull glacier, rising to above sea level, making it the second highest mountain in Iceland, just about lower than Hvannadalshnjúkur.
Split into simpler sentences: Bárðarbunga (pronounced (b'aurðarbuŋka)), Bardarbunga (Anglophone spelling), is a stratovolcano located under the Vatnajökull glacier in Iceland. Bárðarbunga is a subglacial stratovolcano located under the ice cap of Vatnajökull glacier, rising to above sea level, making it the second highest mountain in Iceland, about lower than Hvannadalshnjúkur.