TASK DEFINITION: In this task, you're given a sentence and your task is to generate a simplified sentence that focuses on lexical paraphrasing from the original sentence given in the input.
PROBLEM: the only known communal roost contained only four individuals.

SOLUTION: only communal known contained roost four individuals.

PROBLEM: one of these , zadok the priest , has been played at every british coronation ceremony since.

SOLUTION: zadok the priest has been played at every british coronation ceremony.

PROBLEM: 1979 to 1999 the jubilee line of 1979 was to be the first of four phases of the project , but lack of funds meant that no further progress was made until the late 1990s.

SOLUTION:
the jubilee line of 1979 was to be the first of four phases of the project , but lack of money meant that no progress was made until the late 1990s.