It is correct that German as a language allows, and is sometimes characterized by, very long sentences that can contain multiple subclauses. These usually explain certain aspects in more detail:

```
Sie konnte (a) ob ihrer Schönheit (b), die sie von ihrer Mutter geerbt hatte (c), das Herz des Grafen (d), dessen Mutter mit ihrer Mutter im Streit auseinander gegangen war (e), für sich gewinnen (f).
```

which translates to:
```
She could (a) win (f) the count's heart (d) using her beauty (b), which she inherited from her mother (c), who had a feud with the count's mother (e).
```

As you can see the ordering of the parts is different in the english translation (denoted with a-f in parantheses). 

This can lead to confusion if the sentences and subclauses go on for a very long time as correctly noted by Mark Twain. German speakers in practice do not use extremely long run-on sentences unless they want to specifically _use_ this property of the language or aim for confusing their listeners. There is also a benefit in the German ordering as it places supplementary information close to its point of origin.

In reading oftentimes the subclauses can be entirely dropped to get a much more concise sentence that imparts the same meaning as the original sentence without imparting additional details.
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