public override SpanQuery GetSpanQuery(XmlElement e)
{
int end = DOMUtils.GetAttribute(e, "end", 1);
XmlElement child = DOMUtils.GetFirstChildElement(e);
SpanQuery q = factory.GetSpanQuery(child);
SpanFirstQuery sfq = new SpanFirstQuery(q, end);
sfq.Boost = DOMUtils.GetAttribute(e, "boost", 1.0f);
return(sfq);
}