1. Output

1.1 Subheading1

1.1.1 paragraph one

Some text

Some text

Some text

1.1.2 paragraph two

Some text: See section 1.1.1

Some text, see also 1.2.1

Some text

1.1.3 paragraph three

Some text

Some text

Some text

1.2 Subheading2

1.2.1 paragraph one

Some text

Some text

Some text

1.2.2 paragraph two

Some text

Some text

Some text

1.2.3 paragraph three

Some text

Some text

Some text

1.3 Subheading3

1.4 Subheading4

1.4.1 paragraph one

Some text

Some text

Some text

1.4.2 paragraph two

Some text

Some text

Some text

1.4.3 paragraph three

Some text

Some text

Some text