{% for t in ex['tokens'] %}
{% if 1 in ex['class'][loop.index0] and -1 in ex['class'][loop.index0] %}
{{t}}
{% elif -1 in ex['class'][loop.index0] %}
{{t}}
{% elif 1 in ex['class'][loop.index0] %}
{{t}}
{% else %}
{{t}}
{% endif %}
{% if ex['class'][loop.index0]|length > 0 %}