private String getRoleFromSRL(View srlvu, String verb, int start, int end) {
		String role="";
		List<Constituent> consts = srlvu.getConstituents();
		for (Constituent conIns : consts ) { 
			if (conIns.getSurfaceString().equals(verb)) { 
				List<Relation> incomRel = conIns.getOutgoingRelations();
				for( Relation rel : incomRel) {
					if (rel.getRelationName().equals("A0")) {
						Constituent c=rel.getTarget();
						// Gold mention covers SRL mention
						if (start<=c.getStartSpan() && end>=c.getEndSpan()) {
							role="s";
							break;
						}
					}
					if (rel.getRelationName().equals("A1")) {
						Constituent c=rel.getTarget();
						// Gold mention covers SRL mention
						if (start<=c.getStartSpan() && end>=c.getEndSpan()) {
							role="o";
							break;
						}
					}
				}
			}
		}
		return role;
	}