Task: Sentence Expansion
Input (English): On January 20 , 1914 , the London International Convention on Safety of Life at Sea adopted the Morse code signal TTT ( — — — ) , three letter T 's ( — ) spaced correctly as three letters so as not to be confused with the letter O ( - - - ) , as the " Safety Signal , " used for messages to ships " involving safety of navigation and being of an urgent character . "
Output (English): On 20 January 1914 , the London International Convention on Safety of Life at Sea adopted as the " Safety Signal " the Morse code sequence " TTT " ▄ ▄ ▄ ▄ ▄ ▄ ▄ ▄ ▄ ▄ ▄ ▄ ▄ ▄ ▄ ▄ ▄ ▄ ( three " T 's " ( ▄ ▄ ▄ ▄ ▄ ▄ ) ) — spaced normally as three letters so as not to be confused with the three dashes of the letter O ( ▄ ▄ ▄ ▄ ▄ ▄ ▄ ▄ ▄ ▄ ▄ ▄ ▄ ▄ ) — and used for messages to ships " involving safety of navigation and being of an urgent character " .