A panel of experts on Thursday urged changes to three venues for the 2020 Olympics in the face of ballooning costs but organisers say such adjustments may prove difficult to instigate in time for the Games.
Japan Today
HINTS
S A panel →どんな [of] experts
V urged
O changes →どんな [to] three venues →どんな [for] the 2020 Olympics
補足
[in] the face →どんな [of] ballooning costs
[but]
S organizers
V [say]
O (that)
S (such) adjustments
V [may prove]
O difficult →どんな [to] instigate
補足
[in] time →どんな [for] the Games.