def create_vrt(text, stand_off_data):
    # Devide annotations into CWB's verticalized text format (.vrt) logic
    p_attrs = []    # positional attributes
    s_attrs = []    # structural attributes
    for annotation in stand_off_data.annotations:
        if annotation.name == 'token':
            p_attrs.append(annotation)
        else:
            s_attrs.append(annotation)
    # Sort annotations, necessary for the next checks
    p_attrs.sort()
    s_attrs.sort()
    # Check for p_attr<->p_attr overlap
    for i, p_attr in enumerate(p_attrs[:-1]):
        next_p_attr = p_attrs[i + 1]
        # Check if first_p_attr starts/ends within second_p_attr
        if ((p_attr.start >= next_p_attr.start) and (p_attr.start <= next_p_attr.end)  # noqa
            or (p_attr.end >= next_p_attr.start) and (p_attr.end <= next_p_attr.end)):  # noqa
            raise Exception('Positional attribute overlaps another')
    # Check for s_attr<->p_attr overlap
    for i, s_attr in enumerate(s_attrs):
        for p_attr in p_attrs:
            # Check if s_attr starts within p_attr
            if s_attr.start > p_attr.start and s_attr.start < p_attr.end:
                # Change s_attr start to p_attr's start
                s_attrs[i].start = p_attr.start
            # Check if s_attr ends within p_attr
            if s_attr.end < p_attr.end and s_attr.end > p_attr.start:
                # Change s_attr end to p_attr's end
                s_attrs[i].end = p_attr.end
            # Check if s_attr starts/ends before/after p_attr
            if p_attr.start >= s_attr.end or p_attr.end <= s_attr.start:
                # No further Checking needed (just because p_attrs are sorted)
                break
    s_attr_start_buffer = {}
    s_attr_end_buffer = {}
    for i, s_attr in enumerate(s_attrs):
        if s_attr_start_buffer[s_attr.start]:
            s_attr_start_buffer[s_attr.start].append(i)
        else:
            s_attr_start_buffer[s_attr.start] = [i]
        if s_attr_end_buffer[s_attr.end]:
            s_attr_end_buffer[s_attr.end].append(i)
        else:
            s_attr_end_buffer[s_attr.end] = [1]
    vrt = ''
    # TODO do the work!